I have to disagree with the choice of Energy Roil at level 1. I decided to test out Fel Infusion once, and I consistently had no mana to do much of anything. Kael'thas is very strong when you can throw spells around and absolutely blow up your opponents, but you need mana for that. Also, collecting regen globes becomes pretty natural after a few games with the talent. Great guide though.

Any questions?