Simplest answer would be not to use physical damage spells, at least until a fix is created. It may also be possible to obtain a stone sword from MCMMO fishing, but don't quote me on that :3
You can. If you use the beginning points towards self spells you can gain levels to then later on jump over the basic damage spells. If you already use the points and don't have any left just get some nice armour and weapons and kill the water guardian a few times Sent using Tapatalk on IPhone