i dont know much about them, but what i do know id be happy to share.
its a fun variant to play i dont think it has a very high win rate, also in victory points matches and objective point matches it really hurts to lose a unit that you have put alot of points into.
I assume you mean that you would use two tyrants, full carnifex and few troops correct?
i would recommend raveners for objective based matches
hope i helped
mickeyman