What am I doing wrong?

[Kageru77]

The rewards are contribution based. To always ensure your fair share of seals and marks, join a party. Or, invite people you see shouting for an invite.

[EricCartmenez]

The rewards are contribution based. To always ensure your fair share of seals and marks, join a party. Or, invite people you see shouting for an invite.

This. I stumbled on a mark day one of the release. I shouted to a couple of friends (real life) and they joined me. They were in a party. I was not. I switched to healer and I kept everyone alive, only getting a couple of hits with Stone II (not in cleric stance). I got very little while they all got A or S rank marks. I was PEEVED! Get into or make a party of people as recommended, and even then, get at least 2 or three hits, spamming medica II thereafter. Also, try to get your DPS near you so you all get a maximum and equal reward. Good hunting!