Shock Stom has F4 =100 in the chance to apply elemental effect (electrocute) formula… Being casted by Gaige means it also gets *1.4 in F9 from 10/5 More Pep (assuming Legendary Catalyst COM) which will get >>>100% chance to apply electrical DOT vs any defense type and virtually any level enemy (that is not immune to DOTs / electric …).
The impact damage and the fallowing DOT will also use her Electrocute and Shock elemental multipliers. Being her DOTs , they gets multiplied by her elemental effect damage multiplier (BAR + COM (catalyst) + evil enchantress kill skill Activated by Deathtrap’s Kill that triggered the shock storm in the first place) … This guaranteed electrical DOT then also rolls to trigger electrical burn fire DOT.
Deathtrap is a monster killer with Shared Roid Shield and bugged? Sparkle elemental splash.
Melee enemies are much more likely to clump up around Deathtrap - cast him in view of un-activated enemies and he will rush and get them all nicely grouped. Sprinkle a tesla grenade on top of him afterwards if you feel the need …
Yes the area is small, deathtrap kills very quickly even without it (if something is in range for shock storm it won’t live long near deathrap anyway, 9 times out of 10 nothing is hit by the small AOE …) … but mechanically this is how this skill ‘works’ …