Kelemvors Gavel raises a good point about respeccing to hit a particular DC. You don't have to respec to do that. Reloading the save and rerolling over and over again will be a more effective and time-efficient way of achieving it. If you need to roll a 20, and you have a +0 with no bonuses, you have a 5% chance. If you respec to get a +5 to the roll, you have a 25% chance of success. If you just reload and redo the roll, you only have to reload 5 or 6 times to have the same probability of succeeding the check once:
1-(.95)^6=26.5% chance of success on one roll eventually.
