Well it would be like this
Master Duo Dimension, Control Transluscence, and Pass Door and you gain Phase

It would cost about 100 mana or so last for about 8 hours and be able to have magical control affect it.

Phase: Being a master of other dimensions during battle your able to flick between them dodging blows that would normally hit you.

I think Arcanes are fairly good as they are as i was saying but they are missing something,(trust me i've played my fair share to) And i'm telling you they need another type of damage spell don't know what yet but a number of things are immune to disrupts and it's rather annoying. They just need some sort of something.