Engineering Sniper Cluster Bombs from Explosive Probe don't activate or drop or even show up on the target when Explosive Probe detonates. Same for Smuggler counterpart.
Okay I am not that experienced in the world of BH or PT but I can say this, if you lack the ability to be flexible with your toon in pvp it doesn't matter what rotation you have because in the end you'll just get shanked by a stealth class.