Even if you don't face Soa he is useful, he is a 8/5 4 star that if unopposed will deal a extra 2 damage.
Facing Soa he is a virtual 8/9 unopposed.
May be just me, but after i crossed 1200 SoA and SoB just disappeared almost completely .
I was playing Berzerk/Skeelz deck and was just facing atk.man everywhere (Uppers, Sakrohm, Rescue, Junkz, Sentinel, even Montana), Berzerk (for obvious reasons) and a little Ulu Watu, pc, Vortex and Jungo.
Because of that i tried a Berzerk/Vortex deck and it did just fine, im 1300 now. Gonna try go higher later.
Same I'm at about 1340 now and not seeing many soa. But before 1300 I was seeing quite a lot so I would use him to climb the ladder then if u have some1 to replace him with do it. I'm playing bezerk/ pussy cats atm