AoAC vs AoF (in General)

On a minion training only HP and PL, which would be more beneficial?

The 'argument' being the damage reduction of the AC vs the extra experience saved put into HP..

Or

The extra PL effect puts more experience into HP, but is that more or less benefit in regards to the HP 'saved' by more AC...

For example: Assume a +30% bonus to skills. I want a PL of X, the extra experience to HP would be X-30%/12 would this be greater than the added benefit of HP protected by the AC.

What about if there was a full SS effect?

Thoughts?

I hope someone can decipher my ramblings.

do you use AS? if so, then AoF.

No AS in the equation.

AoAC.
Reason: HP takes a lot to train it up, where a little bit trained in PL goes along ways.

AoAC, PL boost is minimal.