When raiding click off HP, Saves and +6 Str...
Doesnt feel like a good solution.
The following is going to be using the general "you", not you specifically.
Don't treat group play as you do solo play.
You are in a party with other people, and everyone has a part to play in not just the success of the raid, but also in the enjoyment of everyone involved.
The fact is, your DPS is zero when you're dead. Your party members DPS is zero when they're dead. Additionally, when someone has to stop to heal themselves they are not doing DPS. When someone has to back away or kite for a bit, in most cases their DPS goes down. When bosses randomly spin and attack non-tanks (and many boss attacks are AoE, so even if an off-tank is the target, non-tanks nearby become collateral damage) the entire party's DPS becomes jeopardized and will likely go down as people react, back away, or die. Reducing your own DPS very very slightly by turning off a stance helps to guarantee that the entire parties DPS stays high. Besides, -6 Str shouldn't be a dramatic reduction in DPS, especially compared to the sudden 0 DPS of other party members when they get killed by the boss spinning. Even more so with death timers lasting up to 2 minutes sometimes!
1/12 of the party does a tiny bit more DPS because of 6 points of Str but the whole party is at risk of being attacked and killed, causing overall DPS to potentially drop significantly... or 1/12 doing a tiny bit less because of 6 points of Str but the whole party can more reliably apply continuous/uninterrupted DPS safely.
Once you consider the whole instead of just yourself, I think the better solution becomes obvious: turn off the stance in raids where you're not the main tank. It makes everyone better when the designated tank is able to tank reliably, the healer is able to focus their heals, and the DPS is able to DPS freely.