Heroes-4 "Deep forest" off-line Tournaments!

Psixxx is being quiet for some reason, he should've said if he missed the first day or just quit everything...:)

Yesterday my internet was just glitching. Day 1 I wiped out the leprechauns with one imp, gathered resources with the imp, took the armor with Sandrik and I'm lying low; on day 2 I built guild3, broke through the fairies with Sandrik and skeletons—it happened without a single loss, only little mana left; day 3 I don't know who to kill, there are too many losses.

Added after 11 hours 40 minutes
Day 3 I attacked the skeletons and wiped out the first group; out of my 60 skeletons, 20 remained, I bought some more and now have 35 skeletons, but I just can't kill the next group and the hero has no mana. How do you guys kill skeletons?