Venom Recoil
VSP
Covert Tank
This is my bag for league. Recoil gives me a great look to start, VSP when the lanes break down, Covert Tank for spares and my "if all else fails" ball.
If i know the house has a little more oil, I'll go with something like this:
Forge
Ripcord
Covert Tank
(edit: I haven't tried out my Forge Fire yet. I am excited to see which ball it might replace in my league bag)