Arc based light sorc - need help with supports.

I am building an arc (aka chain lightening) crit sorc with summons as tanks,so far i am lvl 42 and honestly i don't have problems blowing stuff up unless it get's too close to me,i am basically building a glass cannon,my main is arc,and spark for bosses (crit multi/add light dmg)

Currently my Arc has light penetration/increase crit chance/elemental proliferation(+7%)

The problem is,i am not sure if this is any good,perhaps there is a combo that is far superior,so i was wondering,what supports are best for boosting arc?

chain, not only it increases the number of bounces, but allows the same hit to bounce back on a target already hit, if u picked static blows i also think faster casting may be better than most.

I'm trying a double element crit shadow right now and my intention was to use arc as my main damage skill, but i had to abandon that idea because it's base damage, cast speed and crit ratio are all quite low compared to other attack spells such as freezing pulse, so i'm thinking to link it with faster casting, chain and elemental proliferation (maybe crit chance too), with the main purpose of stacking shock on enemies to burst them down with my other cold spells.

Increases number of bounces? are the tooltips bugged or something? because mine only says that it jumps from target to target two..or was it three? times. or do they in increase in very late levels?

What are you using fro single target damage? Arc is for groups..

1.) Spell totem w/ summon skeletons for (bosses, rares, and large packs).
2.) Arc + Faster Casting + Chain + increase crit chance (multi target)
3.) Ice Spear + Faster Cast (single targets)

Don't forget to use curses.
ELemental weakness, Conductivity, or Frostbite


Light penetration is useless as it wont go into the - resistances.
curses are applied before penetration so you'll never get into the negatives so its a waste of mana.

You may look into Using bear trap and firestorm for bosses and single targets.
Bear trap + added fire dmg

For aoe atm i use: Arc with light pen/proliferation/cast speed
For single target i use: Sparks with crit chance/crit damage (will add +light pen when i find a decent enough 4L item)

And ofc conductivity curse.

What is that chain support you spoke off?

Why would anyone take chain when it has such a massive damage penalty, which is also much bigger than the damage you make back from leveling it. It adds 2 hits at 50% while nerfing your first 3 by 50% as well. Quality doesn't even benefit arc either?

Assuming my interpretation is wrong and the 50% only applies to the final 2 jumps, that's still only 4 effective jumps instead of 3, a lackluster result for a 200% mana modifier.

The best supports would be anything else like elemental proliferation, faster casting, increased critical strikes and increased critical damage, and added chaos damage. None of these supports have any built-in damage nerf, and they all have much cheaper mana modifiers.

>Light penetration is useless as it wont go into the - resistances.

Wrong, it is the #1 dps increasing gem for spell casters.