I personally have an infamous full accuracy + piety + a few crit points nexus and I have never regretted it. I can push DPS on T10 and T11 and even if someone dies and or we somehow lose DPS here or there, we always meet the DPS requirement for FCoB because I bring an average of 100-150 which really makes a big difference (without it, we are at around 1950-2k DPS).

To the people that say "if your healers need to DPS it's because you are doing it wrong". You are really really really looking this from a very wrong perspective. It's not about needing or not needing, it's about taking your job and bringing its 100% potential onto the table.