Today i focused on balancing the units, after many test skirmishes , most units recieved some nerfs and some got little buffs. It should also be harder to spam mana pylons and mana towers early in the game.

My friend overuses the mana pylons as they have crazy range

Too much of those should normally cripple his economy. They are also fragile and should be easily destroyed by artillery or gunships.

If i remember each of them apply -10 or -8$.

Can you make it so that the AI can't use the mana pylon upgrades? They build a ton of them, upgrade them and then run out of cash to be able to attack the other AI which is also doing the same thing.