How exactly Doomfletch Prism works?

Which exactly damage you get as extra elemental? Entire attack damage that you would deal with bow? Just bow + physical bow passives? Previous + general phys passives? Or something in between?

It has pretty small flat phys damage, is it really that good on highest difficulty maps and toughest bosses? Which unique bows (Except Reach of the Council that seems to be ultimate bow out there) or rares below 30 chaos can rival it's desctructive capacity at later maps?

What if I will not have any gear with added phys damage and increased elemental daamge, will this bow still be good at Endgame?

Your base damage is physical damage of the bow and any added physical from other items, plus three times that in elemental. That elemental damage is based on physical so it will be scaled by bow physical damage passives, there's no need to limit yourself to elemental or projectile damage bonuses.

It's potentially a powerful weapon, yes, I say potentially because if you aren't able to get a decent amount of added physical damage from other items you should probably decide on something else.

doomfletch was the facebreaker's bow. now it's stronger than before. enjoy it

I think good options to boost the damage are:
1. High flat added phys damage rools on rings
2. Pretty much every passive node that increses phys weapon damage and olso the "Forces of nature" passive node
3. The following uniques:
Bloodgrip
Meginord's girdle
Abyssus
(At least while leveling) Foxshade
(Pretty weird idea, but maybe together with rearguard?) The Bringer of Rain
4. Any quiver with a high flat added phys damage roll.
I hope I could help at least a little bit.

raics, thanks for explaining it's mechanics. So it's basically entire physical bow (btw just general +phys damage counts as well right?) attack damage that gets x3 elemental bonus?

What kind of bows you are talking about? Good rares? Or some uniques? Mind listing good unique bows that can rival Doofletch Prism (except Reach of the Council) ?

FCK42, thanks that was pretty informative, Sir. :P

But what if I will have like 2 items with added phys damage and no +elemental damage? Will this bow still be viable or better get something else? Because I think from this list only Girdle and BloodGrip will be good idea for me atm (I plan to use Kintsugi as my body armour as it seems best for glass cannon'ish EV builds atm, Abyssuss seems viable mostly for tanking builds as it increases phys damage taken and I don't want any increase to damage taken, and Drillneck or Signal Fire both seem far superior to Rearquard).

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SunL4D2 wrote:

What kind of bows you are talking about? Good rares? Or some uniques? Mind listing good unique bows that can rival Doofletch Prism (except Reach of the Council) ?

Yeah, good rares, if you want a strong physical bow rare harbingers are the go-to option.

Lioneye's Glare is also a good option, though it makes Physical Reflect mobs more dangerous than they already are, and is outclassed by a good Rare Harbinger (But, they can be pricey so Lioneye's isn't a bad choice even for end-game).

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SunL4D2 wrote:

Spoiler

raics, thanks for explaining it's mechanics. So it's basically entire physical bow (btw just general +phys damage counts as well right?) attack damage that gets x3 elemental bonus?

What kind of bows you are talking about? Good rares? Or some uniques? Mind listing good unique bows that can rival Doofletch Prism (except Reach of the Council) ?

FCK42, thanks that was pretty informative, Sir. :P

(...)

But what if I will have like 2 items with added phys damage and no +elemental damage? Will this bow still be viable or better get something else? Because I think from this list only Girdle and BloodGrip will be good idea for me atm (I plan to use Kintsugi as my body armour as it seems best for glass cannon'ish EV builds atm, Abyssuss seems viable mostly for tanking builds as it increases phys damage taken and I don't want any increase to damage taken, and Drillneck or Signal Fire both seem far superior to Rearquard).

"Gain 110% of Bow Physical Damage as Extra Damage of each Element"

... so you get 110% of physical as fire, 110% of physical as ice, 110% of physical as lightning. Including physical one it's 430% of original amount. Find me gear which gives so much +elemental dmg to be worth not taking even tiny bit of physical one, try it.

Is abyssuss good for that bow. Well... you probably will get similar amount of physical from "all" your gear as abyssus gives you in just one piece, and since this bow initial amount is very small, depending on other stuff you get it either doubles your dmg or gives you 50% boost - seems adequate trade-off for 40-50% more physical dmg taken.

Will it be viable end-game? If you build around it, yes. Are there better ones? If you build around them.... maybe? In this game the most important things are interactions so sometimes even the lamest item can be powerfull in good build and op-over-priced items plainly weak if your build is bad.

If you have problems building your char, pm me - I will gladly help. But also check some guides around to see if someone didn't already build one you were thinking off or something similar which you can modify.

Yesterday when I looked Abyssus was costing above one ex (with 92 available just from online, so apparently no one's buying it), so gearing for Doomfletch can be hard.
In general, every point of phys damage will grant 3.3 points of ele damage, so both physical damage and physical damage scaling will be far superior to elemental damage bonuses.
Gloves, helmet, jewelry...
You need to invest in that, obviously, in the face of rare bows offering double the base dps.
That is a testament to it's strength, however;
A good roll gets a base dps of around 80, which means ~330 with elements. Just good jewelry can already elevate it to being competitive in higher level play.

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SunL4D2 wrote:

But what if I will have like 2 items with added phys damage and no +elemental damage?

Physical modifiers will almost always be better for this item. Consider the math if your bow does exactly 100 flat physical damage per hit (after all your tree modifiers). Your actual hit will deal:

100 physical damage
110 cold damage
110 fire
110 lightning

430 total

So if you're looking at two rings, and one adds 18-22 cold damage, and another adds 9-11 physical damage, the physical ring will be better. The cold damage ring will add exactly 20 dps to your attack. The physical damage ring will add 10+11+11+11 for a total of 43 dps.

The same is true for points in your skill tree. %cold damage will only affect 1/4 of your damage. %elemental will affects 3/4 of it. % physical will affect all of it.

Now, % elemental damage with weapons on your rings and amulets would still be very good damage, but because there is no equivalent physical modifier, that's one of the few cases where you want to grab elemental modifiers.