Honestly, a lot of this is what you are comfortable with.
Answer 3 questions to yourself:
1- Do you carry health pots?
2- Do you use Health Stones?
3- Can you remember a time (or many times) when you felt that using either helped save your ass as a supplement to normal healing and CD's?
If you answered yes, then Blood Draining does the same thing. Its a small heal that is given when you need it most. Ive seen some 3k heals off mine and when your healers is out of range/stunned/goes down/is distracted with a B-rez/ect. that little bit can make a huge difference IMO.
There is something so appealing about backhanding someone across the face with a shield.
Honestly, a lot of this is what you are comfortable with.
I was using blood draining, but now that i am tanking ToGc i switched to mongoose for a few reasons.
1. If you go from 40% to dead Blood draining doesn't proc, alot of the time you will die from 36% or higher to dead, if you slowly tick down get good healers.
2. More threat with the crit/faster melee speed
3. Armor and dodge
Edit: I actually changed from bladewarding to blood draining for ToGC.
In that scenario, I take the straight agi enchant for the consistant avoidance, as opposed to risking not having BW or mongoose proc.
For everything else, Mongoose all the way. You all are focusing so much on the mitigation aspect of the enchant... But keep forgetting that current content is easy. Avoidance won't save you. Bosses for the most part don't hit hard consistently. They hit for a mediocre amount, then wind up and hit you super hard with something you cannot avoid. At that point, mongoose won't matter and neither will blade ward. Blood draining isn't worth it either because of how often it gets leapfrogged. Just use health pots / stones better.
Mongoose still provides a nice amount of threat. That's the real reason you're going to see a lot of top tanks using it. Gives a little bit of EH, a little avoidance, and a little threat.
I believe your missing the main aspect here. Mongoose has a way better glow than either of the two enchants. I mean come on no brainer.
But for what it's worth i use blood draining because I can never get into raids and only run 5 man heroics so with it i can pretty much clean up any boss with ghetto heals from the last survivng ret pally or the priest in blues that went oom because the dps that is /cheer because they just broke 1k dps. gosh i need to tank real things...
But blood draining will save you from a just getting into it side of of things. Dunno if every topic is only for the top of the food chain 50k health unbuffed type.
I would think that if you're in a situation where Blood Draining really helps, you're going to die anyway (in ToGC, or the like). I think the debate is really between Mongoose and Blade Ward, now I dunno for sure, but with a 20% dodge reduction in ICC, Blade Ward might be the better enchant after 3.3.
I mean... imo it really comes down to personal preference and play style. Each enchant has their benefits. Mongoose = okay avoidance + armor + threat, but lower up time. Bladwarding = more avoidance for warriors mathematically, close to negligible threat increase, and no armor. Blood draining is a decent smart heal when you might need it, and each have various benefits, and imo it comes down to the situation and the playstyle of the tank and the healers.
Heh, it feels that way sometimes but you just have to read between the lines. When I see discussions revolving around fractions of a percentage point my take-away is "Any of these three enchants will be fine for almost everything I tank". On the other hand, having made a few attempts on Gormok in heroic 25, I understand why even a tiny boost is important in some fights. I'm currently using Blade Ward, but if I get a weapon upgrade I'm changing to Mongoose - I agree that it clearly has the best glowDunno if every topic is only for the top of the food chain 50k health unbuffed type.
Blizz said that they didn't want a "must have" weapon enchant and it looks like they succeeded.
They want to give us options, yet at the same time throw abilities and boss mechanics that pigeon-hole us into one clear-cut set, (EH for ToC anyone?). Makes sense. /sarcasm
While i respect Xav, i prefer to browse my own logs than somebody elses when making my enchanting decision.
I've used mongoose from the day it came out in TBC. I know how it feels/handles like. I can feel it when i switch between a weapon with mongoose and one with something else. And i've used it at the start till sometime into Ulduar. Sorry, but with the amount of avoidance you get on your gear, mongoose's feel just about dissapeared. And with 30K armor raidbuffed, the occasional 240 from mongoose does f***all. Mongoose for me, friends, is no longer a valid enchant.
I did two raid runs on hardmode with my old mongoose weapon and with the new blood draining i had put on. Mongoose didnt feel any different. But browsing my logs, i found 36 heal procs of blood draining. That is a lot of real world saves, i dont care what theorycraft says.
If you want to imagine how blood draining can save your ass, if you're pushing hardmodes with 2 healers instead of three, i think you can visualize the potential a bit better.
Kugen is clearly using mongoose for his Block set for tanking heroic anub adds. Mongoose is great for that but a fight with huge spike Blood Draning works better for me, i sit at 52k buff HP as a warrior and if i get hit below 30% say on NRB its a free potion and its going to give my healers a chance to top me off before the next swing. saying Blood Draining is useless is say health cookies and health potions are useless. it also depends on you're class, Warriors in most cases should use Blood draining and pallys should use Blade ward and druids should stick to mongoose...i dont belive there is one tanking enchant for all classes.
Am I top of the food chain? Don't know.
Most all of previous examples there are "over the course of a fight" arguments. Whether mongoose is better or blood draining or blade ward. And people looking at an entire ToC run to look how often an enchant procced.
In my opinion that's totally wrong. For me there are 3 fights which can destroy me as tank and those are Heroic Anub 10/25, Heroic Northrend Beasts 25 and Algalon 10/25.
I main tank them all and in each of these fights I noticed that I don't get 2 shot when I die. If I die as tank its almost always from a 10-15 k hit, I also see that I'm below 35% fairly often.
That's why I use blooddraining. Because honestly, at my gear level, on all other fights in game I might as well use spellpower on my weapon and it wouldn't make any difference to the outcome of the fight.
It's moments that kill you and you have to identify those moments and what would have been best on those moments.
Parsing combatlogs of a full Ulduar run or something to prove which one is better isn't going to do you any good.