eThag is awsome. But its a bit silly to play him at 25 points. pThag does it better at lower points. He starts to work at 35, lower is hard.
And i don't agree that you need a carny if you have Typhon in the list. What you do need with Typhon on the other hand is a Seraph and a spell martyr. This since if you ain't got no reach you need the +2 movement to out threaten reach speed 5 stuff (and there is a lot of that), and that is important. The spell martyr is there to force the opponent caster back. Just the threat on scourge have won me matches and when people forgets it they are just dead
A quick thing on the other hand i would really not leave the home without 2 death stalkers with beast heavy eThag. You need something that deals with cheap infantry and a shredder and 2 death stalkers work wonders on that while your heavy kills their heavy
The Feralgeist is also a model i would look in to getting. Typhon with arm 19 and healing makes for a tough thing to kill and if they have to kill him once more most people just start crying

And killing shredders becomes a real project.