http://image.prntscr.com/image/aaf855ec4cbd44d49dca9ea327347ac0.png
It really doesn't matter what your initiative is; you can just tank the hit due to how weak opponents are in speed trials.
Since the trial ask for an un-reasonably high initiative, far higher than what the majority of players can get to; even most lvl 90 players will have 100+ rounds of it left.
Speed trial turns out to be nothing but a very long, boring grind; with no challenge at all. I auto'd through all the speed trials with just kakashi guy kabuto right after getting lvl 65 on this char.