Not a problem I would recommend Crazed Warshipper for the taunt and another c’thun boost however I can also recommend Doomguard as well for another pushing minion to help finish the game and brann I found no matter what to be really strong in this deck now due to all the battlecry effects it can have.

If you where to use Jenkins Id recommend taking out a usher for souls to balance your curve out but your c’thun will have a weaker late game. That’s also the sacrifice too “I may play test that for myself”

I can agree with the extra flame imp over a ritual however instead of loosing the defender for soulfire try the dark iron dwarf if you are also facing to many warriors and or shamans you can trade out a usher of souls for Harris Jones

I do believe Brann for elder would be a strong switch. However try a councilman instead first before the elder