you are right,it is better save mana to after the counteratack.
I max out the mana to 9999 and send your best units until your mana reach 0.Then wait your mana recovered to at least 8800 mana.Then send titan unit or a lot of units
to beat the lord of the hell you have to only use titan units,if a single common unit is in camp,he will atack.If have only titans he will do nothing.This mean you can only use bomberman to repel the enemis that trepass your bow
A tip frpom a pro.
The kinght angel is good against the end,he have a great resistence against magic,you only have to use him against the boss and he shall don´t lay a finger in your base.
Devils are good against arrows,but weak against mele units.Dragon is inverse.
The black dragon is the shadowed form of the blue dragon of Epic war 1
Hey! To beat lord of hell easy so use the crosbow to eliminate the coming enemis(before he arrive)and(maximise when possible) maximise The paladin or protector or best rider to eliminate who pass the crossbow to kill the drasgons and titans use the escpecial infinite arrow. Never use no one comum unit so use bombermam and protectors or paladins.....in one or two in max.Maximise your mana and use the titans(only then)to destroy the castle when lord of hell apareas he not will atack(because he so atack when have comon uniths in the camp.