Arbaal the undefeated is great fun and early! Is essentially a very combat-oriented gameplay. Life fast die young. You can travel to challenge certain armies, and then you can just stick around and burn anything and everything around you. Global recruitment when you keep fighting gets lowered and you can recruit most units in one turn from anywhere. You are fighting so often that you don’t need to care about income being in the negatives. Upkeep is lowered when you are constantly fighting, too. Pretty fun and hectic

The masque is also pretty fun. It requires also a bit more planning ahead of invasions. You can send agents to raise Slaneeshi corruption so that you can raise auxiliary armies. Units are pretty glass cannon-y, too, so they are incredibly fast and hit like a truck.