tricks of the trade is being abused by not showing up as an individual pet damage.
picture shows full fight on patchwerk with no tricks pet damage
the rogue Alathâr has tricks buff on him
pictures below shows that neither rogue has casted tricks
they did this on almost every boss in naxx except for thaddius
here is the entire log Warcraft Logs - Combat Analysis for Warcraft
They always begin fight with tricks and never recast it during the fight, so perhaps there is a bug that you can cast tricks outside of combat, never cast it again during the entire fight and it doesnt get added as an individual pet damage