I stay top 5 nearly every pay out with HK, 88,100,2 and JE. IG100 is much better vs wiggs Meta because you will face 3 AoE enemy Toons and stupid mechanics like Anakin or Biggs that disrupt you like upgraded B2 "Bombers". Often my IG100, B2 and sometimes HK left on the field thanks to a bunch of HP. IG100 basic Attack with Offense Down is really strong if only 1-2 hard hitters are left.
Most Matchups against top Wiggs Teams JE is the first target which happens right after your first AOE thanks to Biggs Ability. If JE survives it is good to heal / reanimate IG88 as the other low HP target that will die (too) soon. Bombs are also nice vs Biggs and Anakin since they gain TM and Turns that it explode nearly at instant speed.
IG88 is only here to get out 1 AOE and 1 Basics Attack, he will die before it (lucky if JE isn’t Dead) or soon after it since his Attacks will trigger Biggs and Anakin.