kill the mares (bonded of course) all the way down to 0 in all skills then separate the mares so they cant gm the mele skills. then have them attack each other WHILE THEY ARE IN DISCORD, one of the most important things people forget is you have to let them pause to get their mana back so they can cast high level spells this gains them faster, it does take along time about 90 hours or so but its all afk bro I usually separate them with a door and open the door they fight etc then it closes I wait about 45 seconds then open it again, any more questions just holla.
If you don't kill them down to 0 its kinda like GMing a charater shit will take u forever way longer than u think.