operatives should have a higher hps potential since they're the HoT healer. That's just the trade, low burst for high aoe healing potential. What would merc be if they had great aoe healing potential and highest burst? Also it's not like merc is completely un-viable in ranked seeing as how asana, durwell, deadly, etc they can all make it work just fine and in the case of Durwell he uses it while maximizing the burst potential of his team's strat/comp. You can say all you want how merc is gimped because of it's hps potential compared to operatives or sorcs, but I'd say this expansion has featured the best healer balance in terms of ranked viability.