To whom should I use my expiring 150 sig stones (5*)?

NoobMaster_Sam

Need help to choose champs, especially the ones who can help me in Act 6.1. Also I have 3 generic AG if some champs in my roster needs awakening. Suggestions are appreciated.

Jerichoharris

Knull got plenty of use from me in 6.1 and max sig really helps him out. He was definitely one of my top 2 or 3 champs in getting to cavalier.