hi jb123, I agree w/ the advice posted by rustysi, & the info contained in the wwengr post linked by Encircled, tho I gather that its info is based on WITP, I've read that it pre-dates WITP:AE.
My experience has taught me a major factor for pilot training - within each group, keep the pilots' Experience differential as small as possible, & always fill out each group w/ the max possible # of pilots (133% of the group's max # of airframes).
In a Training airgroup w/ widely-varied pilot Exp levels, the pilots w/ less Exp always glom the majority of skill increase, while the pilots w/ higher Exp get less skill-training.
For example, if a Bomber group has 32 pilots w/ 30 GrdB skill, & half have 60 Exp & half have 30 Exp, after 1 month's training, the 30 Exp guys will have greatly improved their GrdB skill, but their 60 Exp mates will have made little improvement. But if I have 2 similar Bomber groups, I get better results if I transfer all the 60 Exp pilots to 1 group, & all the 30 Exp pilots the 2nd group. After 1 month's training, all pilots in each group will have significant skill improvement.
So I periodically click-fest thru my airgroups, seeking to transfer pilots to Reserve, then re-manning each group from Reserve pilots using the default ranking of Exp level to get best / least as req'd. My goal is to keep the pilot Exp differential at 5 or less.
While this can be an 'orrid click-fest, it'll be manageable if you make a monthly schedule. Say the 1st day of each month, you review your USArmy fighter groups, on the 2nd review USNavy DB/TB groups, the 3rd day you examine the Canadians.
Other notes from my experience:
- don't try to fill out training groups w/ airplanes, newbie pilots train well in groups w/ 4 planes, even if the group has 33 pilots & wants to fill out to 25 airframes. If a group's Exp gets into the high 40's, then toss them a few more planes.
- train pilots on 3rd-line aircraft, don't let training groups use your best planes.