You need turnmeter control, to prevent that big spider heals. You have Armiger and Geomancer for that.
Unless you run a team that nukes strong enough to kill the Spider immediately (and I don't se the champions for that), there is no way without turnmeter control in higher stages. In lower stages you can kill all Spiderlings with a strong AoE attack right before the big Spider has her turn, but that doesn't work in higher stages. The little Spiderlings have an enormous ammount of hp.
You could try the following team:
- Geomancer. Turnmeter steal on A3, passive damage reflection on the Spider everytime a small Spiderling attacks, weaken, hp nurn
- Armiger. Turnmeter reduce
- Dhukk. Decrease def for the big Spider and decrease attack for the small Spiderlings
- Bad-el as your healer
- Harkeen Greatblade. User her debuff spread after Geomancer burned the big Spider to put hp-burn on all Spiderlings.
You will have problems vs. magic affinity, as Armiger is needed to reduce the turnmeter. I don't have Allure on my account, how does her A1 with "random" hits work? Are all three hits totally random or does the first hit go to the target you choose? Maybe she could replace Armiger vs. Magic Affinity.
P.S.
Did you start just recently with the game? Your account seems pretty well developed, with top champs like Bad-el, but I don't see High Khatun, the day 30 log-in reward.
