samadura
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1 - Logistics
2 - Wisdom
3 - Earth
4 - Air
5 - Ballistics
6 - Sorcery
7 - Leadership vs. Luck
8 - NECROMANCY (as standard) :)))))))))))))))
Forget about diplomacy - it's for beginners... it's not interesting later on.
If sorcery for a mage can somehow be debated, then ballistics or leadership with luck... in my opinion, there are more important skills to replace them with, such as Tactics, Magic Resistance, or Intelligence.
Added 5 minutes later
Hmm... a second hero?! Leveling up a second hero?! Not leveling up Wisdom?! The only thing additional heroes need is +resources and Economy. Maybe also Navigation + Scouting + Logistics, but that would only create a scout who can carry an army from the castle. Making two combat (in the sense of attacking) heroes is, in my opinion, just stupid. Unless, of course, that's what was meant...