I decided to train skills up to 70 via traditional grinding, then use skills naturally thereafter. However, I'm having trouble with ninjitsu. Currently, my ninjitsu skill is stuck at 57.5. For the past three days, I've spent hours each evening using mirror image. I'm gaining hiding and stealth, but I haven't gained a single point of ninjitsu--not even though GGS. I haven't gained via casting dog/frog form, either. I've just topped 90 hiding, but I still can't move past 57.5 ninja. On prodo shards, we start attacking pets at this point, but that's obviously moot on Siege. Advice for a Siege noob, plz?