Are my healing stats good?

I just hit GM 3 playing only loki and was wondering if my stats are good/bad and what i need to improve. Average 10 minutes i have 6600 damage, 15k healing and 2200 domain healing. Is this low? I stopped keeping 2 clones cause I’ve been getting dived. Is it much damage? Should i improve my healing stat? Also is it possible to 1 trick to celestial? Loki isn’t banned so just wondering cause hes the only hero i know how to play.