for solo purposes THEY ARE IMBALANCED. geez, stop trying to justify 40% more damage per mana, IT DOESNT MATTER WHAT YOU SAY. there are other aspects of the game than using a battle regimen with your guild, i have yet to be in a pug where people use it, plus its GETTING REMOVED next patch anyways, which supports my statement even more.
The spells are completely broken and i think you need to just accept it and try it. if it was only say a 10% increase that would be a COMPLETELY different story. but the fact that i can grind nonstop with scourge / banish 1 without EVER going out of mana simply because of their insane coeficients with INT and DPM.
i can bet you my whole account it will get nerfed, then ill bump this thread.