Originally Posted by Pijn

Ah yes, thanks for correcting the name, Culling the Herd. Personally I made a Power Auras effect for both 2t10 proc (with audio) and Culling the Herd proc (without audio), and I noticed Culling the Herd has a near 100% uptime, or at least very high. Either way, I usually apply Serpent Sting right from the start anyway (after the 4 sec of MD), regardless if CtH has procced or not. When 2t10 does proc I re apply Serpent Sting and usually during this time CtH is up as well. In case 2t10 procs but CtH hasnt procced yet, I wouldn't wait for CtH to proc since you might lose the 2t10 before that happens.

Like you said, 3% is an extremely small bonus considering it only buffs Serpent Sting (and not Chimera-Serpent like I used to think) so I personally consider that just to be a small bonus, not something to wait for.