Just playing around with the power set on a Brute and it seems a bit lackluster. For instance only a few of the skills even have secondary gimmick (sleep). why not all of them? plus, the chance is low to begin with. Another ability that is odd to me is Thunder Strike, while it does high damage to the main target the AoE of the skill does very minimal damage, about 1/4 of the main damage, why? Also, Chain Induction seems to only hit 5 max, jumps slowly.
An idea for this set change would be to have most of the attacks have a chance to chain lightning much like how radiation has a chance for and AoE burst. Bring up the AoE damage of Thunder Strike to match its main damage, i could be wrong but other AoE's don't seem to have this damage decrease. With Chain Induction have either a bigger jump radius or hit more targets with maybe the jump speed of the incarnate Ion Judgement.