If we go by the 'what works for extreme should work on expert', then:

LM/Mifune/Darui/Sasuke (fully broken-through); talents: 4/3/1/3/2/Serpent. Remember from round 3 onwards use Lightning mystery before anything else.

(This should work until Lightning's 4th mystery is nerfed. When that happens, switch mystery to 3rd)