If you are a caster, just ignore all the armors, because your magic skills arent affected by the armors anyway. Casters rarely use armor from what I have seen, unless they either have a lot of money/leather or are really high level and find themselves wanting armor. Jump is somewhat easily dodgeable, when you see a Jump message, turn around and run from where the Dragoon came from, and it will -hopefully- jump over you without getting any hits. As with Blink, I believe Wizards use it only to escape for a bit, so it doesnt make your kiting harder. Caster isnt hard to master, as it took me (one of the slowest levelers) only 2 days to do. Also, I think this is going a bit offtopic.