So I logged on and did testing on healing power.
MoR with 300 healing power from traits heals for 2740 per charge.
MoR with full max healing power available from traits/gear heals for 3175
Mirror with 300 healing power heals for 4095
Mirrior with max healing power heals for 4748
Ether feast with 300 healing power heals for 5860 and 670 per illusion.
Ether feast with max healing power heals for 6948 and 779 per illusion.
So Mirror gets a bonus of 653 healing from max healing power, MoR gets 435 per charge ( 870 for 2 charges, 1305 for 3 charges total meaning combined all charges), and ether feast gets 1088 bonus from max healing power combined with 3 clones is 1415 extra healing.
These numbers are from the max amount of healing power you can get meaning full 30 point trait line, cleric gem/trinket and 6pc PvP set that offers healing.
IMO since every slot is wasted for the max amount of healing power, not impressive numbers overall. At best it offsets the increase in your hp via vitality. MoR wins with the 3 charge talent in pure healing numbers.