What class in aqw can kill troll spellsmith?

You have several options as a non-member to take out spellsmith, the ideal ones being Shaman and Necromancer

You can use the heal, summon minion and command undead combo to do 1000+ crit damage and get a quick win.

Or with Shaman, you can use the Elemental embrace and dry lightning to do easy 2000+ damage.

So, you can use necro for survival wins, or gamble for a hard hit with Shaman.

But if you're going member, no going wrong with CardClasher!