Anti-stun
Having no anti-stun on mg is frustrating since mg becomes the main target to take CC but with the skill updates in 1.5.5 this might change, will have to see.
Elemental shell purify
Increasing the chance of purify on ele shell would give mg a better chance vs some counter classes in 1v1's like veno sin sb etc, currently I don't think mg is so great for 1v1 since it lacks any immune or anti-stun.
30 range undine
Making undine the same range as other skills would make gameplay a lot less annoying and it's not like it would affect others in pk too much. I'm often forced to use skills without undine in pk just because it would be suicidal to walk to people and undine them, or I'm immobilized.