Degenerative Questions -- Interface Incarnate Ability

So I am curious how the -Max HP thing works exactly. I have seen people saying in Pylon Tests its better then Reactive. I have a few questions:

1) On AV's and high hitpoint enemies, does it do -1000 HP per application?

2) How many times does it stack?

3) Does it stack with other player's -Max HP?

4) What about pets?

5) What is the duration? Trying to figure out if the 75% chance or 25% chance is better.

6) How does it fare in things like Incarnate trials?

1) It does -1000 max hp on AV's and pylons and GM's. Only exception to this seem to be AV's in incarnate trials but since noone bothers to bring a spider that can scan enemy I am not totally sure how much it does on them.

2) It stacks up to 4 times like any other interface secondary though on pylons i rarely see it above 3 stacks and most of the times it is either 1 stack or 3 stack (rarely 2 stacks for some odd reason I think it is because I am using katana scrapper which has gamblers cut twice in his 4 hit attack chain)

3) It stacks up to 4 -max HP from degenerative no matter how many players attack but it stacks with other type of -max HP (though I don'T know any other but I know there is atleast a couple of them exist)

4) pets indeed apply degen -max HP buff but I am not sure how much it effects since some powers have reduced effectiveness on pets and again not sure how pets attacks effect stacks if it has reduced effectiveness or not.

5) %25 chance debuff %75 damage is better than other one in my experiments but the difference is not much. IIRC there was 10 or 15 second difference on avarage (10 attemp with each T4 and took their avarage times with my kat/sr scrapper when I calculated it %25 debuff one was better but only a minor difference it was however obviously better than reactive with atleast 30 seconds with reactives best vs degens worst) at pylons.

6) since i can't use analyser temp power in itrials I can't say for sure but considering most people brings reactive interface or -regen one it is a good variation in itrials.