Welcome to my life. First - in a TL game - I had more hero damage as Lucio than our Yolodan on top of my ~150k healing. Then a few games later had an enemy Tyrande outheal our Malf.
The two-stacks you get in TL are pure lottery. With a silver/gold/gold three-stack you get two-stacks from bronze 5 - the afore-mentioned Illidan - up to low diamond. And that was in the evening. Don't wanna know how groups look like at 3 am...