Perhaps you should try and remove some WIS along with AGI if you hate it so much and add it to CON, she will need to survive. But personally I would keep the AGI especially if she is quest build you need her to be fast to be able to cast stone wall.

IF combo-ing is an issue then give her weights and cast stone wall first turn (it lasts 4 turns upon cast) poking and being poked does not cause your equipment to break while inside stone wall (except maybe if you wear a weapon and poke with.. I think that may break since you are personally attacking the mob) where as stone wall if they poke you, you take no damage). So your weight will be safe. But if you do not want to take the risk try a low one like the iron balls or the 80T you get from Credit mall along with a Shadow pestle since those are thing you can easily get back without wasting your real money. (shadow pestle may not be safe, as I explained above. I will test this later this weekend when I'm training my earth. because that's how I train him at sharks. He is my CP earth so he has 900+ SPD. I have him wear weights as well as use a deca saddle and the weights do not break. Still in "good" condition and its been a few months.)

Lan will get 126 more stats at rebirth. So you don't have to worry about her WIS being to low after rb for her stone wall. You are already using her Mystery scroll for her WIS at the moment right? so you should not need to worry to much about WIS until after RB. You get 14 scrolls free in game (unless you already used it on another pet). so you can take ALL the WIS off if you need and add the points to INT and CON since you will get it back at RB.

(I assume you are bursting her to 100+ right? so scroll should not apply to training if you need her to wear weights because by then you will have gotten your WIS back) wow .. I felt I was repeating myself a lot there... lol sorry about that.

but.. That's just what I would do...