To be honest MvP's aren't really the best way to job level. My HW is 97/63, because ontop of MvP-ing i level in Lh3 alot. Just fwing away from the snipers, and use SAFETY wall to kill the other monsters. Many people think that you use ice wall to kill the monsters of lh3, all this does is Tele them and / or make them spam there ranged skills.
What you do is safety wall yourself, use storm gust to freeze the monster, amplify, JT. With the High Wizard and High Priest you'll ned a Staff of Magi and GTB, but i myself dont have one so i cant reall instruct on how to kill them. Just F-wing away from the sniper and if you dont have SoM the HW and HP too.
Oh and im talking purely monsters here, the MvP's require ice wall, and they take quite alot of time unless you have a creator friend willing to lower its HP down to about 10k-ish then logging out as you proceed to finish the monster off =3 (/cough)