Since I didn't see this in the OP's suggestions unless I glossed over it.

Encourage people do Feast Season by giving them unique points through Feast which they could exchange for Feast rewards would work better than adding Wold marks as a means to obtain them.

They could have a weekly point gained by doing 5 Feast that week. Another point could be gained by having the best "weekly" rank and the last set of points could be based on your ending rank for the Season.

So you could have the following:


* 1 Guaranteed point for doing 5 Feast that week

* 1-5 Points for scoring high in the weekly based on your rank maybe have a cut off where if you scored at least X amount of points you will still get 1 points

* 5-10 points awarded for the end of the Season with everyone involved getting 5 points and then the other 5 points based on varying ranks including those who scored high enough to win the Feast items cause then they could actually add in other items that you can only buy with these Feast points.

I think this would be the best way to encourage people to do Feast but also offer other means to obtaining the items only gained through the seasons, since if they do the point system right it would still be tricky for people to get all the items just by getting these points they would still need to rank high and attempt to be the top 100 to get everything.