You can get some items like Rainy Doll, cat's eye ring to boost your sp a little. If you really can't buy any special SP scrolls I recommend just going slowly and wait until she's high enough level where she has enough sp to wall up to 3 cows.
As for the basic attack instead of walling problem:
Your remote should have her only defend/shield as a first and second priority along with the other 3 turns. As for the wall, keep it there and make sure the amount of hp to wall at is less than that of your water or characters that are not attacking.

I had an sp item from long ago so i was lucky enough to cuss my Xaolan until 100. I'll try to find out if there are sp scrolls or armlets that she can get normally. I'm pretty sure there has to be one...(EDITED)

Well...the only scrolls that you can get through quests are hp ones so I would just try to get sp eqs if I were you. Here are some of them:

Rainy Doll = +50sp (HEAD) lv: 52
Crystal Earrings = +50sp (SPECIAL) lv: 54
Light Blue Boots = +100sp (SHOES) lv: 74
Spirit Medal = +90sp (SPECIAL) lv: 78
Black Crystal Ring = +30sp (SPECIAL) lv: 14
Star Cap = +20sp (HEAD) lv: 40
Gold Staff = +90sp (WEAPON) lv: 58

You can simply just get a good compounder to make some of the lower level ones. If you have the money, you can buy these from someone else. I would definitely try to get the light blue boots for when you really want the most sp gain. Combine that with crystal earrings, rainy doll and gold staff and you got +290 sp. I wouldn't try to get spirit medal if I were you, its too hard to waste the time and resources to go for. Hope this helps!

Last edited Thu, 21 Aug 2014, 4:03pm by BladeEgde