Foci and multiple spells Options

[Raiden]

If you cast 2 spells in the same combat turn, and have a power focus, do you add the power focus dice before or after splitting the pool? I remember something about gunfire where I think it said to split the pool BEFORE adding modifiers, I dont know if this carries over to spells or not, and another question, why do the spells like lighting bolt, and flamethrower cause so much more drain, but usually do LESS damage then the direct ones? if they didnt have the chance to "dodge" them it would be at least a little better, but, fighting someone with decent reaction, body and armor and they are useless it seems