I'd like to create this space to let you fellow inquisitors post ideas on how to make up for the recent nerfs on Diversive Tactics (DT) perk/Debuff skill tree and Augmented Body II (AB2).

I will share mine, considering that for now most of them are just "on paper" and haven't tried them yet.

Damage

Obviously damage has been very heavily hit from the nerf: now the final Debuff passive considers stacked vulnerabilities as a single debuff, so that DT would seems quite useless from this point of view; however, maybe not all hope is lost: among the new Ancient Relic enchants that have been datamined, there is this one:

Shattering: "5.0% Damage Bonus for every Vulnerability stack on the target" (Item types: eye_implant)

From this statement, it seems that every single stack of vulnerability still counts separately: if this is the case, then with a good eye implant of shattering maybe the DT/Debuff combo could still be viable. Has someone already managed to find an eye implant such this and tested it? If one favours another perk over DT, maybe a "Random vulnerability on hit" relic enchant could be used instead.

Investing in the Debuff tree at this point would be a matter of choice, considering that to get the final passive one has to spend something like 16 points for a return of approximately +50% to damage if the build manage to apply many debuffs at once.

Critical strength nerf is obviously another huge factor to consider: before the nerf, I was at +101 unbuffed, so considering passives and "+% crit chance and +crit strength against debuffed" secondary enchants I had no problems; now, I tried to remove a not-so-useful 3-psalm doctrine and added another +30 crit strength with shards and although I'm not mathematically sure to reach 400% crit damage every time, I've smoothed out the issue.

Survivability 

At the moment, I'm keeping the new version of AB2: the +50% suppression damage reduction is quite good, and with some investments in the Health tree, particularly on Neural Rewiring, Shock Stimulus and Pain Suppression, the situation is quite manageable (except for psyker powers at high difficulty, they hurt like hell). Ideally, I'd like to reach the cap of +75% rolling it on gear, then I admit I have no idea on how to improve further, so every suggestion is welcome.

Apart from Suppression, i noticed that I'm also taking now much more damage than before; I was quite startled in the beginning, because the only other thing heavily nerfed was the Damage Reduction on Crusader armors, but a 10% loss in mitigation could not explain the situation, until I remembered of a very nice Debuff passive:

Demoralize: -3% damage inflicted by enemies for every stack of vulnerability on them

I removed it when I reset the Debuff skill tree, so I think that this could be the factor I was missing; as soon as possible I'll try to set it up again and do some tests to check if the difference using both this and DT is noticeable.

So, any ideas/criticism/suggestions? Feel free to politely share them here :)