Life Leech - stacking or dampened

[Chattius]

It seems life leech effects are stacking. With 3 parasitic mindstars and one unique ring (Bloodcaller) 90% chance and 105% life leech are possible. Even it is nice to play an adventurer with solipsism and telekinetic weapon, i think it is a bit too easy. Just sitting around and doing mind attacks while dreamforge gives constant healing if enemies are close. With a third mindstar tk-wielded it even pulls enemies into the dreamforge zone.
A mind sear attack on a target dummy did 857 damage. I received 430 healing AND 562 psi heal.

Perhaps doing something like a hyberbolic function instead of stacking? Something like x/(x+100). With x the stacked % of chance.
x=0 , new = 0
x=50, new = 33.33
x=100, new = 50
x=200, new = 66,66

Of cause parametres could be added to trim the function to create values which aren't too unbalancing.

[HousePet]

Would be simpler to make it always 100% chance of working, then multiple sources wouldn't scale quadratically.

[posetcay]

I cant wait to use my parasitic mitotic mindstar