thanks, yeah a duration betwen 6-8s will make DRK have enough time to recover all his HP by himself or depending of the situation most of it since DRK will be able to use several edge betwen his attacks to fully recover himself, the recast duration should be proportional to the duration of the buff since at contrary that WAR DRK will be able to fully recover himself much better, the HP you recover can be ajusted too to don't make it so independent of the healers.
my sugestion of WAR:
well this mostly gameplay, many complaing now WAR is to easy and boring (specially for the new animations) so i was remembering when ppl tend to love WAR back in HW what they love so here my sugestion.
enchance the berserk theme:
WAR berserk window was one of the most popular mechanics of the game, triple fell cleave and the fell cleave meme was all around so i suggest bring that back.
gauge:
WAR no longer have skills that use gauge, fell cleave/decimate/upheaval and onslaught no longer cost gauge, instead this skills produce gauge to a maximun of 100, each skills grants a certain number of gauge so it takes betwen 60-90s to fill the gauge on optimal gameplay (i leave everyone how much they will love to have inner release), WAR will have a skill to build gauge during downtimes.
fell cleave/decimate: need 5 deliverance stacks to being used, each combo grant a certain number of stacks, both skills grant rage gauge.
upheaval: mostly unchanged, grants rage gauge.
onslaught: get same threatment of plunge and equivalent, the skill can grant rage gauge or a stack of deliverance to add some management here too.
infuriated: grants 5 stacks of deliverance, the rest is the same (note: meaby have a maximun of 10 stacks to add some flexibility and avoid overcaping, can be represent as a secondary bar under rage one.
inner release: can only be used at 100% rage gauge, under inner release every WAR skill get a animation and potency upgrade, path combo, eye combo, upheaval ect ect, under inner release each GCD grants 1 deliverance stack.
note: inner release can have a recast timer to have better control of the aligment with raids buffs and have a small surplus of rage to don't make the job excesively complicated to manage similar to requiem cast system.
unchained rage: works as a finisher of inner release, if 3 fell cleaves/inner chaos are used under inner release unchained rage becomes feller cleave (lol) dealing masive single target damage, if 3 decimates/chaotic cyclone are used under inner release unchained rage become fissure dealing big aoe damage.
storm eye:no longer need to be used as part of a combo so you can use it when you need it making it easy to have it early on aoe situations (tentative).
resume: WAR will work like now bulding stacks with his combos (keeping eye buff) and (meaby) onslaught as fell cleave/decimate(with they respective upgrades) and upheaval grant rage to the gauge, under inner release every skill with have a animation upgrade and you objetive is use all you kit to land 3 fell cleaves or 3 decimates to activate the respective action with unchained rage (meaby reduce fellcleave needed to 2 depending of how tight the window is but still able to land 3), the potency of the inner release window will be high but not excesively high so WAR is not excesively dependent of raid buffs windows and get to powerfull and make it more easily to balance him dps wise.
all i say im not a WAR main since 3.0 so everyone are free to think this sugestion is trash and dislike it ^^
i think thats all my contributions for tanks, im not fan of making this stuff and probably never make one of this again so thanks for reading both WAR and DRK posts.