I'm using sindra trinket + satrina for pretty much all bosses. stamina scales super well on bears, sindra trinket is good for stuff like sindra/halion breath or soul reaper. Satrina adds another good amount of stamina and another defensive cooldown.
Only in case im offtanking rs25hc (embers) and maintanking bpc (valanar+taldaram) im switching my satrina for the organ since its gonna keep up the procc on high stacks all the time.
I was also thinking about using the organ instead of satrina for outside rs25hc maintanking because it can probably stack up well while the inferno is up, need to try it out tho.