I recommended going to Leafre and training on these mobs at these levels:
Levels 77-81
Birks (Crossroads)
Levels 81-87
Red Kenataurus (The Area of Red Kentaurus)
Levels 87 - 105
Red Wyverns (Red Wyvern's Nest)
Some of the platforms allow Ice Strike to hit wyverns below you, however require their wing flap to be above their head. I recommend watching a Youtube video on how folks train there.
Entering Cash Shop or changing channels spawns you up top and allow you to utilize this.
The best exp from 105+ would be to party at Jr Newties and then 108+ at Skelegons.
This hidden-street guide for i/l mages is also really good!