This requires a little backstory before I get to the questions.
Now that I've reached around 1700 heals and when fully raid buffed I have around 360 mp5 while casting, I've started to become curious if there is a level of whether I should be gemming healing/spirit gems or just go straight healing. This is my armory. Right now it seems last I logged on I was playing around with my feral set and apparently forgot to swap it out for my chest piece, which is the Shimmer-Pelt Vest, I have the 15 spirit enchanted on it. I, no matter what raid I've done with my guild ever get the totem love, they all say my mana regen is too good for it.
This all comes about though, from the first time I experienced Halazzi in ZA. The first time we encountered him with a successful downing I actually had to use innervate and quite a few mana pots, it was around 5 mana pots and I believe I had around 300 mp5 while casting. I was lucky enough to get the Shimmer-Pelt Vest so obviously it increased my healing power and spirit. But last night we went up against Halazzi again and to my surprise I ended the fight with only using 2 mana pots, around 2000 mana and I didn't have to pop innervate.
I run with a priest healer and a shammy healer, so obviously shammy is on raid and priest on main heals and I get stuck somewhere in the middle between raids and main heals.
I only have 2 gem slots atm, and I have the 18 healing and an 8 spirit. So my question is this, is it more beneficial to have slightly lower healing and higher spirit so I can last longer through fights and possibly save the innervate for my priest healer, whom btw has around 2.1k healing and a freakishly huge hps, or should I gem more healing?
Or, and this may be the kicker, is it that we're more experienced in running za and I'm just getting better at healing efficiently? I love to toot my own horn :D