If they halved the regen from int and then added half to psyche that would open up alot more psyche fighter builds.Forgive me I don't remember the exact number but rough estimates but...On my fully kitted out bulging sheevra FM I have about 191 mana and Fulm/mental projectile use 30 mana per cast with a return of 80-105ish damage. Right now full rotation i can blast out 6 spells before needing to sit down, good rng thats a riser kill bad rng ill need maybe 2 more spells. Player wise on the tankiest boys they are effectively out of the fight in one fulm/mental projectile combo. -10 mana cost would reduce the cast to 25 mana per but what does that accomplish? The best suggestion that I've seen in this thread is add mana regeneration to the psy stat it would make psy not a dump stat anymore or less of a one anyway and frankly while we are at it add stam regeneration to the con stat or provide a primary skill to make increase to the base regeneration. Really I would just love a complete rework of the skills system but thats a different thread.
On my mage if I fulm and then mp them they are one hit or two hits for a fighter to finish. Thats around 70 man in about 10 seconds for about 140ish damage being conservative. The other route is to use corrupts which is what most of the better mage mains do. You should not be running out of mana casting lessers and corrupts so you can just nuke at the start and then play corrupts or finish with outburst.
I also use a lot of flamestrikes instead of the normal TLs. I just cant go back to TL its like 20 more damage with a FS which will prob have a fulm on them. Easy way to nuke down a player to the point they are one hit and turning back. Even then Im not running out of mana and I dont even have points into dex instead of maxing out psyche. Im not running out of mana on mage in PvP, and if I do I wait like 5 sec and can have a fulm ready if for some reason I dont want to use corrupts which are what you should be using in most fights.
Only time my mage has mana problems is in PvE where you need to have high DPS.