Assuming SE continues with this trend of swapping out merit spells for more useful categories it seems that RDM should be in line for the next update. (Though I would understand if they did NIN next instead since RDM already got buffed somewhat recently.)

It is probably too late to have any influence at this point, but does anyone have any speculation/suggestions as to what the new merit categories might be?

Something like this might be nice:

Augment Composure: Grants the ability Composure a resistance to dispel effects. Increases resistance by 1. (At 5/5 Composure would resist 5 dispel attempts before disappearing.)