Help with Pride Watcher's eye melee physical build

What would be a good mod for a physical melee build while affected by Pride?

% double damage chance
% impale chance
% increased physical damage

thanks!!

Hello there.

Do you have any particular skill in mind?
Also, do you intend to use Brutality Support gem?

Hi! I'm testing a Ground Slam/Heavy Strike build and yes, brutality support.

I never build a pure phys build before so any help is appreciated.

Aight.
I don't know what's your budget, but Pride Watchers aren't usually cheap.
Realistically, let's drop the case of a triple Pride.
Now, considering the investment, if you had to pick 2 of these, i would highly recommend the first 2 if you can, because they will boost your DPS by a lot, and because they also work at full effectiveness even if you play without Brutality Support, which is something that might happen in the future.
And if you can only afford one, the first mod is probably your best bet.
There you go :

(8–12)% chance to deal Double Damage while using Pride
Basically 8-12% more DPS.
The only situation where it sucks is if it makes you reach more than 100% chance total, in which case a part of that percentage becomes actually wasted.

Your Hits Intimidate Enemies for 4 seconds while you are using Pride
Basically 10% more DPS.
However, it becomes useless if you are already able to intimidate from another source.

(40–60)% increased Attack Physical Damage while using Pride
Probably the worst mod of all (in most cases), but still something.

The following ones will only improve the physical part of your DPS :

25% chance to Impale Enemies on Hit with Attacks while using Pride
Pretty strong, even if you don't specialise in impale.
The only situation where it sucks is if it makes you reach more than 100% chance total, in which case a part of that percentage becomes actually wasted.

Impales you inflict last 2 additional Hits while using Pride
Hard to tell the DPS boost that one would give you, but it sounds significant enough if you decide to specialise in impale.

Few words about an impale and it's additional hits. With rough calculations if you use only 20lvl impale support, without dread banner and nodes from tree it gives your around 1.3 multiplier to your physical damage on top of other multipliers. With impale watcher eye's mod, in the same case, multiplier will be around 1.4. With more investment in impale - 100% chance to impale and increasing impale effect(8 skill points + way to that impale related nodes ,20/20 dread banner and impale support gems) multiplier will be 2.05 without this watcher eye and 2.45 with it. So, generally speaking, this mod gives you from 8% to 20% more physical dps.

"25% chance to impale" mod alone, without any other investment in impale, gives you around 13% more physical dps.

EDIT: Probably, the least costly way to use impale is dread banner, so damage improvement from additional hits will be in 5% to 20% range.