CLUMP. This means: select your unit > click behind the building you wish to attack ; when the bat is "clumped" against the building press s and than cklick on the buidling to attack it.
Ofcourse when using corsair fireboms agaisnt mallorn trees don't do this. ^^
Now we are talking about recource harassment anyayws... HARASS MORE...
rly...
You killed like what 3 Mallorn Trees?
BAD
Than your power choise...
You did well choosing land as your first power.
It's good
Further, when you see your opponent has a landpower too, don't cast yours untill your opponent has casted his; than cast your land over his.
Talking about powers another micro tip:
when you see arrow voley is going to come over your units prees x to scatter them.. you lost rly alot to arrow voley.
Now tell me this: why did you get untamed alegiance if there was no troll or dragon lair to cast it on for strong cheap monsters?
YES, NO USE. Think before you pick a power.
This is all I can think of atm, gl and hf with your game
p.s another tip: play on fords of Isen II, it's a great way to learn te game, since it's a very good map.