The Boost and Command stacking in this game gets out of hand really quick, so much so that I wish it were actually a little less wild. It makes sniping boosters a little too effective and snowball-y. At least the forward guard decoy strat is much easier to pull off if you purposely make the decoy a unit that doesn't benefit from the rest of the team (like, say, a Wraith).
The "Supreme" race (crown icon) is immune to all status ailments.
Wraiths are actually a pretty cool addition to the game IMO. For one thing, they make ideal decoy units, since it seems like half the Wraiths in the game come with Evade 50+. Many also have Poison Attack, which sidesteps their damage penalty against non-Poison/Undead. A Wraith-centric party is less useless than it sounds, since 1/4 of over 10x the enemy's HP is still enough to kill them, and there are plenty of Wraiths with hilariously high values of Helmet Split, Critical Boost, Lethal Critical, and/or Max-Power Attack (no seriously, most of the offensive ones have 150+ skill levels combined in these skills, which is nuts) to help them get there.