Getting past the bloody spider.

[jake21]

I'm actually at this point in my second play through and having a bit of an effort. On warrior impossible I did not find this fight so difficult (dont' remember level); but on mage impossible level 17 I'm finding it rather difficult.
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Troops:
royal snake 57/60
jotun 2/2
beserker 60/60
ancient bears 45/45
Jaris 11/11
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sucky spells (titan armor, titan sword)
sucky other spells (fire arrow only does 450 damage); only useful spell I think I have are
heal and stone skin
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Oh well I've failed twice but will try try again. I think maybe I should swap the jotun (which seem useless) with polar bears.I don't see any method to get to level 18. I could try leveling my baton for more leadership. Hum. Doesn't look good....