One thing also to remember with a paladin is all of the tanking/agro/aoe spells are instant cast. That means the loss of DPS by using a castsequence over a cast random (lag confirmation delay) is removed because its done during the global cool down. I recently swiched from a cast random on my paladin to a cast sequence and its been a huge increase in dps and survivabilty by having holy shield up 100% of the time. Im not high enough level and havent speced a point in judgements to get a real 969 rotation but the one I did have when I fought a target dummy useing wisdom seal, judge and blessing allowed for a constant spam of about 9 minutes with a 4k mana pool before going oom. That and with all wisdom buffs it took about 40 seconds to just melee swing back to full mana. In real use I found that I never went oom or even close when pulling in an instance and I havent been in a fight against a single target boss that lasted 9min.