Some realy helpful tips: (1) Never NEVER upgrade factories. It will be the worst thing ever to do in this game, just put some Enginers and Builders in Team that worth lot better. (the same is not true to previews game of serie) (2) When you find the 5th Inspector, just buy the knife. It's not only the powerful, the fast but the better weapon in the game, it's the only weapon that kills fast anything (even super boos). (3) Take very good care of your soldiers, you will miss them. If you choose "take to team" take care to not let them die, if you do, they will be lost forever, survivers are not immortal like Inspectors and Worker. (4) Berserker III let you revive when you die. This is the hardes game of serie.
To restore HP and SP quickly just get "Get 'x' HP/SP after kill an enemy" and keep hitting a enemy after it dies (it work nice with Thunder Lv.3 and Falchion Special Attack). + if helpful
 "Sort the Court!"){kind=icon}
 "Decision 3"){kind=icon}
 "RPG Shooter: Starwish"){kind=icon}
 "Theme Hotel"){kind=icon}
 "Arcuz (Full Version)"){kind=icon}