This list... I'm not sure what it's going to do.
Venethrax really doesn't need a Corrupter, as he has few spells that he wants to arc (and the only thing the Corrupter has going for it, IMO, is the ability to turn a model it kills into a faux-arc node for its controller). If you want this jack for the melee, take a Seether instead; if you want ranged (and you should know up front that Cryx doesn't play a shooty game very will - they can do it, but you have to work for it), fit in either a Leviathan or a Harrower. A Harrower will perform well both in melee and ranged, but its got a hefty point cost attached to it.
The Bile Thralls should never be your only infantry selection, and especially in a low-point list such as this one. Biles aren't going to hit anything with their spray attacks that they can hurt with them, they can't melee, and while their Purge is amazing, they are going to be enemy #1 for your opponent if he's fielding any infantry of his own - and with the Biles' defensive stats, they drop like flies if anyone focuses their attention on them. Biles are very much a specialized/niche unit. They're very good at higher point levels if you can keep them around, but in order to do that you need something else to pose a more immediate threat to your opponent.
At any rate, the rank-and-file Cryx units are Bane Thralls, Bane Knights, and Mechanithralls.
Bane Thralls hit like a truck in melee (they'll scrap jacks), and have Stealth to keep them from getting shot up on the advance. Unfortunately, they're kinda slow.
Bane Knights are quicker, have reach, ignore terrain, and hit almost as hard as Bane Thralls. Unfortunately, they have only their armor and whatever terrain you can leverage to keep them alive on the advance
Mechanithralls die like flies, but they're numerous and cheap, and hit fairly hard.
There are, of course, other units, but these three are good starter units and will be useful in just about any list you want to play.
As for your solos, the Warwitch Siren is wasted in this list, because you've only got one jack on the board and she can't Power Booster it if Venethrax has allocated it any Focus himself. If you take one of the Bane Units you might want to consider trying to make room for Bane Lord Tartarus, but you can live without him for now, I would think.
Hope this helps. If you have any other questions, let me know.
