Hey everyone, I have had some time to number crunch and stuff and I'd like to share what I've found so far to help others and hopefully get some helpful replies!
So rotation-wise, I have crunched out the following:
(this rotation is what I found both in-game and spreadsheet-wise to maximize damage output based on RB > BT)
00.0 - HS + RB (Battle Shout and Berserker Rage along with your initial white hits will allow this)
01.5 - BT
03.0 - HS + ?
04.5 - BT
06.0 - HS + RB
07.5 - BT
09.0 - HS + ?
10.5 - BT
12.0 - HS + RB
Your "Other GCD ability" should be slam, shouts, sunder, berserker rage, deathwish - basically anything on the normal GCD. The priority here would most likely be:
1. Deathwish/Berserker Rage - ONLY if your character is NOT enraged, you will miss your RB otherwise
2. Battle/Commanding Shout - ONLY if your character's rage is low OR the buff needs refreshed
3. Skip it - if you didn't have enough rage to use the last BT on cool-down, wait for RB to be back up
4. Instant Slam - only if you are on track with the rotation, if there is any doubt, wait for RB.
Some of you might say - "Why isn't slam top priority for the free slot if Bloodsurge is proc'd?"
Reason: Currently, slam's damage is extremely low compared to BT/RB/HS. Based on the suggested rotation above, warriors have a 6-second rotation that is repeated. If you don't use the free GCD slot right when it becomes available, you will delay the rest of your rotation. If slam is the reason for the delay, you are extending the time of your DPS rotation. From my testing here is the breakdown in average damage per use, with the value in green being the equivalence points in relation to RB:
RB: 10,373 (1.000)
BT: 7,181 (0.692)
HS: 9,697 (0.935)
Slam: 4,231 (0.408)
Based on this information, using instant-slam right on time will net an 11% increase in damage for that 4.5-seconds rotation,
and if we assume it is available 30% of the time like the talent suggests, it would net an overall DPS increase of 3%
only if used correctly for EVERY 4.5-second rotation.
On the other hand, if you use the instant-slam after the GCD becomes available (by more than 0.5 seconds) it will result in
an overall DPS loss for the following 4.5-second rotation. By skewing your BT/RB rotation, the following 4.5-second rotation
becomes a 5.0 second rotation (assuming your instant-slam error occurred 0.5 seconds after the GCD was available), lowering this 4.5-second rotation's DPS by 11%.
Therefore, using slam correctly will increase your damage over two 4.5-second rotations by 6.0%
Whereas, using slam incorrectly will decrease your damage over two 4.5-second rotations by 5.0%
So my suggestion is to use instant-slam if you can use if RIGHT when the GCD is available (and you have enough extra rage of course) otherwise, it is not worth the DPS loss.
EDIT: Based on user input, my numbers have been updated to more accurately reflect what is going on. Now the DPS loss/increase balance each other out. Using slam when it is available for your free GCD will net an overall increase, but I would recommend using it ONLY if you have enough rage to do so. Rage starving yourself before the next GCD is the worst thing you could do for your DPS since your main damage abilities would be starved. If you can pick out a handful of times you can use slam, go ahead and squeeze that extra DPS out, but if you cannot utilize slam EXACTLY at the available slot (and have enough excess rage), skip over it.
Based on personal experience, I generally do NOT have enough rage to use slam unless I RNG using shout and then get a bloodsurge proc I can use the next free GCD. The effort required to manage using slam and how a correct usage can essentially be "canceled" out by an incorrect usage is not worth the minor damage increase AT LEVEL 80. Tons will change come Cata, so keep in mind this is JUST to hold us over for the time being.
Do what you will with this information, I hope that it is helpful to somebody!
Please post any suggestions/feedback or anything else you'd like to see similar to this post!
For reference, my self-buffed stats are as follows:
Attack Power: 5601
Haste: 12.26%
Hit Chance: 27.29%
Crit Chance: 41.25%
Expertise: 26/26
Mastery: 11.2
MH: Heroic Cryptmaker
OH: Heroic Cryptmaker
Special thanks to Christey for helping correct numbers and catching mistakes!