The problem with the current level progression system is that there are simply not enough 320 items available, period. You get 3 guaranteed per week in challenge mode, but you are not guaranteed to get what you need. Furthermore, you also need multiple 320 items to get an item from 310 to 320, due to the fact you do not get 1:1 infusion value. This just increases the grind to a ridiculous level. They need to get rid of the current system. Trash it. Let light progression be a result of time spent in the game, and let us grind for the items we REALLY want (assuming they have made items we actually want. Y2 gear is crap/subpar!).