My friend i guess it's your first season here that's why you cry so much. Kat is a very good player and he built his character to play only bp. That's his job. About celestial one time i had 3 cele's in a row.It's called skill mastery it can effect the duration or reuse or even both at the same time. About mana i told you they use the salvation bow from their marriage and apart of from that Kat as you see holds infinity Rod which give you a lot more mana plus he plays with Bless the Soul,Clarity,Song meditation and maybe active clarity? His skills are probably all enchanted for cost so hespends less mana for each heal/skill. I hope with this message you will understand how little you know about lineage and you will stop crying Everyone can play bishop but not everyone can really play bishop.