no. only 30% chance. while wrd/bard front aoe have 2 sec cd
edit: im just curious why you underrate wrd/bard so much. this class have a extrem huge potential, related to group setup (like many classes)
Greetings
If it is just curiosity then I am happy to share my experience with you.
To be precise, only critical hits of Sonic Chop trigger Sepal Stab. Also it being a front AoE makes it less effective than if it was a regular AoE Skill. It also has a 2 sec AoE while Warden/Druid especially in the first second can spam three powerful AoEs instantly which results in high dps. Most of the time mobs are dead within 2 seconds of AoE burst in Dark Core.
Tamb boosts Pet damage by ~33%, even though Tamb is just 15%. Lets call this effect "double effect" (btw this also applies to Cenedril)
Warden/Rogue has many double effect buffs which results in very high pet damage. iirc three buffs with 10%, 18% and 24% effect. This is a multiplicator of x2.59 for pet (1.1^2 * 1.18^2 * 1.24^2).
Warden/Bard only has one double buff (Perfect Harmony) which boosts petdmg by ~33%.
Even if Warden/Bard has many more Sepal Stabs than Warden/Rogue in Dark Core, the hits themselves are just too weak. From what I recall we are talking 20kk vs 7kk. While in AoE-Burst situation Warden/Bard might be stronger, Warden/Rogue will easily dominate thanks to its regular hits being quite strong by themselves, overpowered singletarget burst and high sustain damage in singletarget.
Unrelated but also worth mentioning:
With Scout/Bards Musical Shot recent change from 10% pdmg 10% mdmg to 10% increased dmg, Pets were indirectly nerfed. Now instead of making use of the double effect (21% dmg) Pets only do 10% more damage.
