If youre looking for arc-nodes I'd suggest deathrippers. Mainly for their sustained attack can open up assassination and even some hurt to heavies. I personally love how he works with leviathan in smaller points. Good melee with scything touch on him (p+s 19

), and can threaten large base easily. Mcthralls are great with him for scything too, so thats a good call (even if they hit only half the time). Unless there are a lot of horde armies and infantry spam in your meta, I think the biles are a little overboard since most people tend to run lots of jacks or beasts in smaller points.
The only other problem is your Thalls, both bile and mcthralls, are small command range so blast/aoe could just eliminate most your army quickly. this is what i'd suggest for agressive fun times.
Iron Lich Gaspy (*6)
*Leviathan (9)
*Skarlock (2)
Mcthralls min (Leader + 5) (3)
Satyxis Raiders min (Leader + 5) (5)
*Satyxis Sea Witch
UA (2)
Or I'd suggest banes of any variety instead of the raiders.
Imo gaspy1 is pretty tough and can hang out up front slinging spells when not giving
foc to the leviathan to pew things with his
ROF 3 spiker. Charge him up, pew pew pew with sustained, feat, pew pew pew again = dead caster.