Triarii gone weaker and can't hold the phalanx again... but the Polybian princepes is the best troops available for clearing up the wall (save Envocatae and Praetorians)... Polybian Hastai are the best light troops available, and their velites can easily kill Peltastai with proper use...

THat's right their cav sux, but why not training hellenic / gallic equivalent?