Just curious about the title question as I can only find L/H build for sorcerers with pets. Is there viable L/h BD for nbs? Especially when ambush gets buff in next patch ?
ZoS has decided that Light and Heavy attacks (What I'm assuming you mean by L/H) are simply passive elements of a normal rotation. Light attack before every skill, heavy attack as little as possible. Max DPS.
Sorc pet HA builds are a slight exception. They're still not quite endgame DPS levels, but the passive damage from pets and the AoE potential from shock staves + Sorc passives makes it viable for a lot of content.