This is the steps I used for Xao:
(unchecked)
1st: def
2nd: def
3rd: def

(checked)
top pri: def
2nd pri: blank

your party HP<0 (blank)
your party SP<500 (stone wall)

For the water, it use the same skills as normal bursting but instead of water shield, its soul dodge.

The fires uses the same skills as normal bursting.

The cows attack with their back kick.
I gave Xao a mysterious scroll so she can have enough sp to stone wall.

I managed to burst xao until shes 65 with these steps, but took a break and then came back and tried bursting her again, but it didnt work.

I tried every steps I can find on google, but non work.

Today, she end up not stonewalling anyone.

What seems to be the problem?
Thanks.

Your Xiaolan should be having that set on HP since her EXP is based on the EXP that the pets ones that she Stone Walls is getting. Spot bursting won't aid you with this due to the fact that the pets would heal over time. The way the healing system works via the "Party < xxx" is if their SP is actually used and have been lowered(meaning not at max.)

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Spoiler:

"Leo" Server.

Spoiler:

Earths -
Metatron - 176 Reborn Killer [633/190/31/48/86] (Earth main).
Orelia - 131 Reborn Wit [4/225/341/48/100].
Seraphel - 153 Reborn Mage Knight [31/208/276/60/341].
Zachriel - 81 Reborn Priest [0/395/76/77/0].
Daedalus - 85 Reborn Wit [0/165/312/48/35].

Waters -
Nuriel - 175 Reborn Wit [18/185/507/60/150] (Water main).
Meimiel - 101 Reborn Seer [0/170/172/60/206].
Rhamiel - 81 Reborn Priest [0/395/6/77/0].
Noctus - 88 Reborn Mage Knight [39/193/146/78/308].
Opheus - 83 Reborn Wit.

Winds -
Heimdall - 81 Reborn Wit [0/130/304/49/65].
Anael - 81 Reborn Knight [6/26//10/26/510].
Zofiel - 99 Reborn Killer [586/94/39/39/39].
Anelia - 81 Reborn Knight [190/80/7/49/227].
Hox - 187 Reborn Knight.

Fires -
Zelix - 156 Reborn Killer [615/155/13/42/13] (Fire Melee main).
Alilidier - 160 Reborn Wit [13/167/615/42/13] (Fire Mage Main).
Zeliel - 86 Reborn Killer [476/66/9/45/12].
Seraphinus - 117 Reborn Killer [375/104/9/51/126].
Shadders - 172 Reborn Killer [606/164/4/42/15] (Given alt).
Kronos - 86 Reborn Wit [6/144/395/42/6].
Hades - 86 Reborn Killer [395/144/6/42/6].
Atariel - 136 Reborn Killer [492/180/18/47/66].
Tariel - 130 Reborn Wit [6/145/510/42/22].

Manufacturing Slaves - Dazmond, Misane, Coeus, Perses, Lapetus, Oceanus.
Collection Slaves - SecretC2, SecretC3, SecretC4.
Fish Storage Slaves - Fishslayer, Kronosx, Totoxin.
Equipment Storage Slaves - Oranos, Menoetius.
Burst Slaves:
ShexSlave - 85 Reborn Killer [520/2/2/42/4].
ShwexSlave - 85 Reborn Killer [514/0/0/42/4].
Cusser - 82 Reborn Wit [0/20/511/20/0].

Names for Safekeeping: Dovahkiin

I followed the steps nivle, but xaolan continues defencing throughout the battle.
Any other ideas?

HP should 600 or greater for less than part because if you are bursting long unsupervised burst will cease when cows get too high of a level.

Also SP < 110 Sake or Grape syrup(If Xaolan cannot stonewall at least get enough SP for next round).

Cows at beginning will not be stonewalled because of full health. Make sure all Cows have hp Recovery low 50% or less.

this might be late but, uncheck the 1st-3rd rounds, xao prioritizes def than using stone wall because you fixed her 1st-3rd round with def. def on top priority is enough.