There are a lot of different enemies with varying resistances, but most of them are physical (slash, pierce, missile). After several enemies are defeated, 4 more enemies will appear. 2 will be in the middle of the towers, the other 2 are close to the south tower.
While it is doable without a tank, it will be much easier to have one so that your healer won't have to heal the entire party. The featured unit for this quest is King Mont, and he's good for this fight since he can raise hate, and Double Resist from Nightblade subjob.
Without King Mont, since Double Resist is an area buff, you can bring a unit with the skill to buff your tank to also get those resistances. Odin can also be quite helpful to reduce damage. Bringing healers like Yuna and/or Ildyra can make it fully auto-able, especially if your healer also have a revive ability.
Map
Reinforcements
Luartha Stats & Resistances
Max Level Stats
HP
4089
DEX
301
TP
86
Luck
269
AP
183
Move
3
ATK
372
Jump
1
MAG
81
Range
5
DEF
0
Bravery
97
SPR
20
Faith
50
AGI
76
Hate
0
Buff・Debuff
Effect Range, Accuracy Up, Area Attack Res Up
Type
Human, Wezette
Resistances
20%
10%
--
--
15%
--
20%
--
--
--
-10%
--
--
--
--
--
--
--
50%
--
--
40%
--
50%
--
10%
-10%
--
Serjes Stats & Resistances
Max Level Stats
HP
4568
DEX
273
TP
60
Luck
266
AP
184
Move
3
ATK
371
Jump
1
MAG
62
Range
2
DEF
0
Bravery
97
SPR
20
Faith
30
AGI
71
Hate
0
Buff・Debuff
Pierce Attack Up, Accuracy Up, Area Attack Res Up, DEF Piercing Rate
Type
Human, Wezette
Resistances
5%
--
-30%
--
-10%
-20%
--
--
--
--
--
--
--
--
--
--
--
--
--
--
40%
35%
--
-35%
--
--
-10%
--
Khury Wezette Stats & Resistances
Max Level Stats
HP
4411
DEX
304
TP
152
Luck
253
AP
200
Move
3
ATK
400
Jump
2
MAG
99
Range
3
DEF
0
Bravery
97
SPR
30
Faith
50
AGI
80
Hate
0
Buff・Debuff
Missile Attack Up, Accuracy Up, Casting Time Reduced, Area Attack Res Up