[ ] Plan Draft
Army Actions
-[ ] Intense Drill
-[ ] Found New Regiment (Elven Infantry, 329 Trained, 356 Regular, 315 Professional; Cabot Muskets)
-[ ] Found New Regiment (Human Infantry, 555 Trained Infantry, 445 Regular Infantry; Cabot Muskets)
Influence Actions
-[ ] Acquire Intel on Enemy Forces x3 (-30 Influence)
Okay, so here's a quick plan draft on actions we're probably going to take (assuming we have at least 3 Army Actions). Founding two new Infantry Regiments to bulk out our battlelines, and another Intense Drill to make up for the loss of Drill. Influence we're basically guaranteed to put x3 on getting Intel on the enemy, but the question is if we want to do anything else. Counterintelligence is a possibility, but also looking at our numbers, we might want to hire some additional Human Infantry for replacements, or a couple of Hobgoblin artillerykin since it seems that Drill can take from Artillery units and we want to enter the next battle at full strength.
Notes for Starting XP Level of Elven Infantry Regiment
Starting at a base of Trained for the Elven Regiment of 300 Trained, 350 Regulars, 350 Professionals. 350 Regulars means 35% of the way from Trained to Regular for 3.5 out of the required 10 XP.
35% of the way from Trained to Professional is 35% of 30 XP, which is 10.5. So in total, 14 XP. That is 14/10 required from Trained to Regular, bringing the formation up to Regular and 4/20 XP to Professional.
Going up to 329 Trained (to get rid of all our Trained Elves) adding a few more Regulars in exchange for Professionals is 31.5% of 30 XP + 35.6% of 10 XP for 13.01 XP, so a Regular Regiment with 3/20 XP for the way to Professional.
Aaaaand, I think I might have hired on too much good quality Elven Infantry in my plan...

Well, I suppose this means we have good quality casualty replenishment for them in our manpower reserves for long-term.