You will notice on (Every level) a special event is triggered when the enemy castle is reduced to a certain value (usually 20% of castle health) and then the enemy will mass troops. This is why you dont start your main attack until you have maxed out your mana. Then let the enemy troops come close to your castle and start massing your troops. The enemy troops will keep your troops back allowing them to bunch together. You should get an army of at least 30 mages and 20 paladins and 10 healers before getting to the enemy castle
Upgrade your towers as fast as you can and "Dont send troops!!!"
Only send troops once you have 99999 mana and then mass swarm mages and paladins... lvl 8 should be easy this way
I didn't think that they could make it more boring than the first.. I really hope they don't put a challenge here so i don't have to go through this garbage