Mana rege doesnt matter the different between 5 or 10 mana regen is nothing. The point is not to spam for example exura gran because mana rege is 30-40, if it's 5 or 10 its the same for me. The different is only in making runes, with 10 mana regen u will runes faster = u dont have to spend much time for making runes, u dont have to care if u are wasting sds when u are fighting because u have enough runes and its good. For example u are chasing enemy and u care about shooting sds because u have with u just one bp, but if u have 2 bps u can feel more free to shoot. As for me 10 mana regen would be better because u can make runes faster and u cant even spam spells like on illuminate where mana regen was 35 and u didnt have to care about mana when u were healing. If the mana regen will be 5 it means players will use more mcs to get runes. I will for sure use some mcs to make suplies for a war.
And about economy and runes worth, who cares about that ppl are selling runes only on start to get cash for promo so just make promotion cheaper for example 10k, so ppl will just make desert quest and get prmo and then safe runes for hunting/waring.