I'd be building up those Drop Pods and the second Vindicator. If you did a T1 DP with Marneus in it what would you want from the Command Squad? CC potential (ie. everyone's gunna need the best save they can get to survive dropping) or shooting potential? I've toyed with the idea of running a Storm Shield/Lightning Claw CS with a couple Melta Guns in there for armour popping T1. Throw a couple Dreadnoughts in the other Pods and prosper. You could take 4x 10 man Tactical squads in Rhinos and have them accompanied by the Vindicators, while the Drop Pods (potentially supported by Assault Marines) rush up for melee.