How about making the FFH2 Drill promotions easy to remember, with a slightly geometric progression (that's what makes the Drill promotions so much more interesting than the combat ones...just as long as it isn't overdone), and add on a Drill V and have Drill V open up Leadership, Morale, Tactics, Commando, Blitz, etc., so the drill promotions aren't just a dead end.
Drill I: +1 first strike
Drill II: +2 first strikes
Drill III: +3 first strike chances, +30% resistance to collateral damage
Drill IV: +40% vs. mounted, +40% resistance to collateral damage
Drill V: Heals units in same and adjacent tiles extra +5% per turn (will stack with other healing promotions on same unit), +50% experience earned (would only effect unit if it would have gotten 2 or more experience from a battle), unaffected by fear.