Some classes or specific builds struggle with mana currently. Or in other words, there are some mandatory mechanics or skill combinations that are needed to get along with mana.
I personally like the Sentinel mechanuc where you get mana back with some filler skills. When the filler skills do more DPS than your high cost attacks# there needs to be tweaking. But many of the filler skills get additional mana costs when skilled for more damage. That’s a good balancing method.
In the other side I also like the suggestion of @Stormquake in his thread about mana here:
This would give mana based classes like mage give an increased incentive to build high mana pools.
Somebody here said that hes fune with mana reg being an issue early/mid game, but with endgame the character should be able to get that mighty si mana gets trivial.
I can’t agree with this. Yes, this works this way in other games. And I couldn’t say I dislike it. It doesn’t feel bad in any kind that I can spam all my high damage skills forever like in PoE. But combat wise LE feels very different than PoE. Much slower pace. And imho the current “importance” of mana or in other words the lack of mana trivialisation in endgame fits very well into this.