We cooperate with Ruin and did some brief tests. We had 15/0/9 on kotbs, buffed it was overcapped str, 625 WS and 28% crit, 33.2% armor penetration and tons of melee power from vic+warlord+bloodlord weapon. Kotbs had +150 str, +10 crit, +25%AA and parry buff from IB. Obviously bloodlord weapon.
We tried with IB armor debuff and without it, kotbs applied m1 armor debuff always. We tried with 3 auras from conquest and with -toughness -resists. It was very tricky to keep both taunt and runefang buffs up, but we managed. Tactics on kotbs: biting blade (just to squize some additional dmg into 3 sec timeframe), FO, runefang, overpowering swing
Rotation was sequenced into blazing x2 - arcing swing - staggering - blazing x3 - taunt - vicious - shinning blade (best dmg output to press it before MF) - myrmidia canceled with precious strike. Construct obviously either double armor debuffed or at least m1'ed.
We didnt specifically fish for crits so most important question was how much we can fit into 3 seconds. Turns out not so much.
We managed to somewhat reliably do 6-6.4k within 3 seconds (had 6.2 with 1 armor debuff max) on not failed tries and both agree that if you spend time to fish for crits it can maybe reach ~8k as absolute maximum.
Sadly got my screenshots all over the place, so ill afterwards replace it with 10k IB one, but just for the sake of proving here you go with what IB does in same conditions
Brief conclusions:
1. Kotbs has pretty nice sustain while trying to burst, we struggled many times because construct died too fast for us to proc/apply everything. When you focus on burst as IB construct dies on burst rotation but general time is higher, kotbs easily kills it within 17 seconds while fully focused to actually burst, not sustain. Also IB test was a bit different with going in and out to be sure taunt stays, kotbs moved either side ways or behind construct with procs up so dummy stops hitting.
2. IB just mechanically is absolutely unmatched in terms of 3 second burst. I believe no other tank class can fit so much damage into 3 seconds timeframe.
3. 5.3k within
1 second (!!!) on IB, its just nuts. I've got higher number somewhere, once i merge file directories ill find those test (they were done right after change that made pots stack with buffs so str cap become easily reachable). Highest 1 second burst we got on kotbs was 3.6k
4. double armor debuff, resists debuff or whatever. it just doesnt go further then ~6.5k on kotbs reliably.
5. IB on SS was 15/0/9 so its not super unrealistic vs. what we ran on kotbs. In case IB goes 13/5/5 which is a working spec it will surely outburst any playable kotbs offensive spec (all of which are just pure pugging unlike IBs).
We now back into drawing board to see if kotbs can do more, but at the moment im out of ideas what can be done to increase the number for kotbs.