For RTW
1. Cataphracts- best heavy cavalry in RTW for plain slogging through the enemy
2. Cretan Archers- I send so many to the ferry man (Charon of Greek Mythology) with these guys
3. Scythian Mercs- I just love using these guys for skirmishing

For BI
1. Cbiirii Immortals- Gah! Almost nothing can take these guys out
2. Francisca Herban- human lawnmowers
3. Graal Knights- King Arthur anyone?