When you go for Savin, go for the big guns
Breaker canon for each hand it's a good start
you may find use for Ovaknight external armor - it's quite havily downmassed and useful
Reaper's Savin Shield with the thrown weapon can be a lifesaver at times, but you must consider the penalty to hit with breakers
as for mounts, either put something with blast on them, downmassed energy weapons or rip them off
still, you should prolly try some mecha enginnering - putting some of Vadel's Class 8 overchargers here and there can make a real difference in movement speed, and if you'd like to go melee, it's pretty crucial to close that distance as quick as possible