Anyway quick rundown of why i believe Ikki takes this (also this shouldn't be affected by the AP change in the revisions right?):
Not gonna work due to Ikki using hearing to know his moves
- Strategy, surprise attacks, tricking etc
Not gonna work due to Ikki's precog, danger sense, awareness etc.
Well Ikki does the same except Ikki will have better range, not to mention he uses stuff like erasers, rocks or just about anything mid fight to win against his opponents, trying to touch an opponent like that would be an extreme task, especially when he knows everything you're gonna do. Not to mention Trackless Step would turn the tables here, making Assassin unable to perceive Ikki, pretty sure Culex won't be able to deal with all those.
Will work, though Power Null just prevents blitz, while Mind hax is completely negged, not gonna do much. Ikki has fought at full power with worse.
Ikki would vastly outskill in terms of close quarters combat. Someone like Ikki who's been fighting opponents who outclass him in literally everything using a stick, would be FAR more skilled in CQC than someone who 1 shots just about everyone while nulling their entire arsenal and giving them mind rape in the mean time all while being invisible to them.
And to top it all off, as shown against Kuraudo it takes as little as less than a minute for Perfect Vision to kick in, so it's not gonna be too late before PV enters the fight. Once that enters the fight, it would be Ikki's sure win due to the fact that Ikki will know everything Culexus tries to do at that point.
So yeah I vote Ikki for these reasons.