Lol base is perfectly fine
Claws of thunder is just another light damage skill but blades of ice skills will help deal with lightning immune. No need to run a merc or sunder on this character either.
Runic has higher claw damage, and if you're running bond swap the extra requirements are irrelevant
tldr it's a 3 ps mosaic in a needlessly high req base
worth less than what you spent on rerolling it