my shadow priest is almost level 34, and drinks after every killed mob pretty much..
is there a better way? or is this the only way? stack up on food/water?
is there a plugin? that can go and buy stuff for you?
http://www.thebuddyforum.com/honorbuddy-forum/classes/priest/51521-shadow-priest.html
This cc will turn your priest into a killing machine, rarely needing to stop for water! I'm leveling a priest, and had the same problem as you with singular. But once I put this in my singular folder, I could go for at least 5 pulls with no water.
I'm using this also, its beast mode. Wearing BOA's I literally never stop for food or mana.