By the way, Richard doesn't really look like a traitor. After all, we had a chance to follow his plan, and then we wouldn't have received any of these disks. Although, maybe he would have come back for them later...
Revan, regarding the potions: I healed myself and healed John. Take a look and see how it's more beneficial to do it, so as not to waste too many, but still be almost healthy. We should leave at least 4.