If everyone can simply buy/obtain a raise item then the mages would be out of a job. I think RR should be enough, but maybe one day SE will give us a phoenix down or some form of that to use on a pty member if both are on a DD-type job. I think generally duo'ers will often be DD/mage and that mage usually has raise.

Speaking of soloing raising though, I think if you die with your fellowship NPC out and you don't have any form of RR up then your fellow NPC should give you some sort of raise before they disappear from your side.