Since more players have learned recently how to manipulate it, it's been pushed towards extremes that I'd never seen before.
Just a few minutes ago on my hero, who has mark of Gain:
Prof: magnetic influence - Level 239, modifies hp by 696 for 5 minutes.
A few days ago on Ruthgul, who has mark of Loss:
Prof: magnetic influence - Level 241, modifies hp by -361 for 11 minutes.
(This capture on Ruth was before someone tweaked it 4 more times to get more hp for Gain, so it's probably at -400 hp right now, for Loss.)
I've tried to push it to regain some balance, but it seems a lost cause. Every time we achieved near 0 hp for Loss, it got pushed back to a new extreme +hp for Gain, extreme -hp for Loss.
Where I understand the affect only lasts a few minutes, my main concern is it's slowly making my character not eligible for runs.
Alternatively, is there any way to revoke the marks of Gain/Loss? Many of us get the marks, without knowing that this affect will randomly hit us once we get them.