Hey Guys Quick question. Right now I am using heroic Jaws, 2pT12 and 2pT13 and I feel I have to much regen. I am sitting at about 2960 Spirit without any stacks from Heart of the Unliving and feel I should dial some of that back, what is a good place for spirit right now? I have been looking at Rawr and it had been telling me to dump all of my Spirit into crit, which I can do I just don't want to go diving into hard modes without enough spirit. Thanks a bunch
Heart of the Unliving, Jaws of Defeat, and both 2pT12 with 2pT13 are currently some of the best tools we have for longevity. As for how much longevity you need, it comes down to how comfortable you are with your level of regeneration in the given raid environment, the amount of healers being utilized, healing assignments, play-style, etc. so I can't give any absolute amount of regeneration that is necessary. The best reply I can give is that browsing through armory most holy paladins progressing in heroic DS are sitting around 3000-3500 spirit, so you're definitely in the ballpark especially with those overpowered trinkets.
Be weary of simulations and theory-crafting for healing as healing is reactive and it isn't possible to predict how much unnecessary damage your raid may take by ignoring mechanics or standing in fire or when your tank has horrible RNG and doesn't avoid anything. Most healer sims have some sort of sliding scale with throughput on one side of the spectrum and longevity on the opposite side, try messing around with those kinds of settings before arriving at a conclusion such as "replacing all spirit with crit."
If you really do have so much excess mana and for whatever reason you can't reduce the number of healers in your raid composition then there are plenty of itemization tweaks you could do to trade some longevity for throughput. Looks like you've already done these, but using power torrent instead of heartsong and the burning meta gem instead of the ember meta gem are examples of trading longevity for throughput. A healer can also use caster gear without spirit or hit and reforge a secondary stat to spirit for a small trade-off. I like to use 4pT13 for some encounters where mana isn't tight as well.
This kind of a question all healers ask themselves from time to time as balancing longevity and throughput is crucial although I'm fairly certain once you delve deeper into heroic encounters appropriate for your gear level the excess longevity will be a nice cushion.