deathfire or thunder lord keystone mastery on jax

{quoted}

Why not fervor? You can stack it pretty quickly with your passive then jump on someone

because base damage syngerizes well with trinity, i'm already getting a extra 25% from building .

the usual harrase or damage combo is 2 aa, q (which activates trinity proc) empowered w + trinity proc and base damage for large burst. because i need 10 fevor stacks to activate it i'd have to wait much longer to all in.