Does fire mage in legion/prepatch has issues with going oom? How to deal with oom? Personally kinda never played mage, all I know that arcanes have/had Evocation or sth to regain mana. How do fire mages handle mana?
Fire and Frost haven't had to manage mana since Cataclysm. We don't have any regen abilities anymore either. The only time you'll be going oom is if you're spamming Spellsteal and it's intended to be that way to discourage spamming it in pvp.