It seems like no matter how much mana leech or MAK you have, it’s not effective. Your mana pool is way to small and fury is such a mana drainer that you end up steady drink pots no matter what
spirit + ring gives you shitloads of base mana
I run that build with non eth upg titans atm and chug a juv for mana once every five p8 solo cs runs or so, and that's due to storm caster mana drain. other areas you have even less mana issues