beginner help guide

[s2now]

hello
im havin trouble with normal difficulty
i was wondering if someone could help me list some of the basics strategy of the game
such as what skills should i get for warrior, paladin, and mage
wut unit combo for each class, wut battle mode strategy for each class

also, adventure mode is in real time, does that mean creeps get stronger by the minute, coz i always get owned by much stronger army
and how can i summon rage spirit(im playin as a warrior right now)
thanx a lot, it would really help me with my game!