I have basically given up on SMN getting a band-aid before the next patch cycle. However, if there were to be a new trait I would add to Arcanist that would benefit SMN dps it would be something like:

Aether Tap (ACN trait)
10% chance when pet deals critical damage or critical heals, will increase damage dealt by you and pet by 10% for 15 seconds. While active, 10% of damage dealt will be absorbed as MP.

The values could be tweaked for balance, but the key here is that only damage dealt is increased, while the absorb effect works similar to Bloodbath except with mp. A SCH that is focusing on healing won't be nearly as capable of maximizing the effect as a SMN could. Even if they did SCH would only restore a max of ~300 mp minus casting costs based on the current values during the Aether Tap uptime, while the SMN has Garuda racking up ticks along with 1k fester nukes to take full advantage of the effects.

Could it happen? Probably not. But I have hope that Heavensward has a hidden agenda regarding SMN buffs, and every post comes closer to bringing this to SE's attention.