[DakAttack]

I think the NPC quest is worth it, and if possible you should find some one to help you out. The first fight in the quest is in an open enviroment, so if you can find help for it that's great. It's right outside of Jeuno so hopefully it wouldn't take too much to convince somebody to help. The second fight is inside a BCNM capped at level 40, and is soloable by a naked level 40 character. Half way through your NPC comes in to help out, so it shouldn't be too difficult for three level thirty characters.

Getting to Rank 4, on the other hand, might be. Luckily if you're with two other friends Attaining Rank 3 should be cake. The boss fight capped at level 25 really only needs a Black Mage or Red Mage to sleep the Dragon, a melee to take down the eyeball and Dragon, and somebody to heal. Getting Rank 4 requires a run up through Delkfutt which can be a hassle if you don't have a guide and/or a map and medicine.