hey..you should also try completing fei's deathblows.. it helps a hell lot..when fei learns
his final blow called yamikei which lamost deals 6k damage alone.! it rocks! also if your able to learn this blow you'll be able to use the most ultimate blow of XENOGEARS called kishin! it deals like 9999 damge! (only available in maximum level gauge of your gear)! .oh yeah theres a shop in the light tower which sells str drive and all other drives! it gives you 1 or 3 points in your STR when you use str drive! rock on!