My candidates:
1. Combine
Sideswipe and Shrouded Blade and I'd "accept" either all-aspect or flanking/rear for the combination - doesn't matter to me. (The need to control our frontal DPS may get in the way of this, dunno.) It's also possible to throw
Ruckus in here, in which case the HO icon should probably be "coin".
2. Combine
Disembowel and Stab.
3. Combine
Deceitfulness and Ruthless Cunning.
4. Combine
Hardened and Amazing Reflexes and add them to BOTH
Dauntless Advance and . . . what's the name of that other stance? . . . oh, yeah,
Ruffian
The first three would take 3 icons off our hotbars, and save 9 to 14 CA casts per minute (if I did the math right lol), improving DPS and the effectiveness of our 5-minute buffs slightly. It would also remove a couple of icons from the mob's list of effects.
Number 4 takes another two icons off our Hotbars.