PoE2 - Mana Leech aura is too much

Hello,
I would like you to considerably nerf the mana leech aura of rares and bosses. I am all up for a challenge, but this modifier absolutely bricks casters sometimes. If a rare or boss is fast enough to just jump on me or run me down I cannot do anything as a caster. My 2.5k mana pool is gone in 1.5seconds and then I can only watch him kill me. On rares it is annoying, but manageable. I have however just now found a boss in T15 map (the big bell owl boss, whatever he is called) with this aura and I dare any caster to go into that last small pit with him and survive.... that is completely impossible.

Please nerf this aura, it is far too punishing for casters and there is nothing to be done if the monster is fast and/or not CCable. On bosses this is absolutely ridiculous.

Suggestion - make the mana leech scale with monsters mobility. If it is fast and/or can gap close quickly, the leech should be highly diminished. I am all up for keeping high leech on medium/slow mobs to punish carelessness.