x40 blob, autocannons, flamers/grenade launchers, commissar.
2 or 3 Chimera vets, meltaguns, maybe demolitions.
Leman Russ Executioner.
Naked PCS in Vendetta for late game objective grabbing.
Astropath useful but not essential.
I'd take a basic CCS. Creed only useful if you are taking leman's to outflank to be honest, in which case he can be absolutely deadly
Creed also a beast if you are going gunline: x4 orders to twin-link x4 heavy weapons squads, or x2 blobs and x2 heavy weapon squads...or x4 blobs...And FRFSRF...Amazing. But you have to have the right type of list to warrant his inclusion.
Creed and Straken lists with Al'Ahrem (or whatever his name is - sorry, I just got back from the pub!) can be hilarious, because then you are ouflanking a squad of leman russ's and a whole platoon, with straken giving blobs furious charge and counter-attack (better used for counter-attack in 6th due to the FC nerf...So defensively on objectives)...But I digress.
Just remember hammer and anvil requires a decent 'anvil': tarpits, aka blobs. And the other units providing the hammer need to be mobile and offensive. So blob (or two), plus chimeravets, leman russ's, hellhound variants if you are into them, etc...It's also a very good idea to take artillery: Manticore, Medusa etc.