I see, well I'm sure this won't be fine at all. Based on what we know they are likely to use magic, the suits should be resilient to that for the most part. But unless they are just way too submissive all the time I can't see them being more threatening than the wasps (at least if they aren't hitting some kind of weeknesses). Have we ever used identify on one? If not we might as well, it could tell us something useful. Otherwise let's try for incapacitation rather than kill. It'll probably come down to them being more afraid of us than the scorpions. Let's use blizzard on them and puppet to make one of them run away in terror (or something resembling it). If they get close, pin them down, if they use magic respond with a similar magic. And move forwards, we are trying to appear invincible. Hopefully they give up, if not Lri can knock them out while invisible. Speaking of invisible, we could try cloak to get everyone past, but that would require a mana potion after half the group. A fun if likely impractical option is to cloak the zombies then have them grab the spiders while invisible. If they do turn out threatening, fight properly, we do not want to lose someone because we were trying to look impressive.
I'll let someone else work out what to do after subduing them.