Ok so my math skills are not the greatest...

[piscina]

The HP/MP stealer have 30% probability of suction:

 

1. HP stealer: 5% of dmg done

2. MP stealer: 5% max mana

 

The acc stealer seals work:

 

1. Each seal has a 5% chance of suction x%

2. You must add the probabilities of each seal

3 The suction of life or mana works as a block, ie if you have 3 SOL (3% suction each seal) then you have a 15% chance of suction 9% dmg done