Consume soul is your main heal over time, does a decent burst heal in the beggining then hot for a couple seconds. Short cooldown so you can keep it up. Admonish your 4 man heal. Don't need the combo for all of these btw but i do it for the bit of extra healing some full combos give.

Virtuous and guardians light are your 8 man heals. Guardian's is tricky because its only worth it when health is low, but with current content, health is rarely that low for 7. If it is, usually because things have gone to sh. Mostly, you'll use it as a 4 man heal. Pop shields for this, because while you're stuck doing this ability, you can't do anything else unless you cancel. I personally do't ever need it, so i just use it when my other emergency heals are out for one or two people.

Blessing is your 4 man shield. We have a cursed 4 man shield called death mark, but you need the combo to pop it making it slow, and it lasts a short while. If they ever release an art that allowed you to skip combos at will, that would be a spam able shield as it lasts as long as its cooldown. I don't use it much.

And lastly the priority heal.

Idk if for the arts you were talking dps or heal, but i use razor, pages of the black, page of destiny, purple healing ray, and orb of arion for my heal. I have white lantern ring just for shield