The main question here would appear to be: How many people get booted, and how?

Aitutaki appears to lose the one challenge shown (presumably the IC). The prime candidate for boot on Aitutaki would appear to be Jessica, who was not reprieved from her chicken-losing incident in Ep2, since hers was the only non-Manihiki tribe not to catch chickens. Another possibility is Cecilia.

Lots of choices on Rarotonga, should they require a companion boot (which seems likely). Rebecca and Stephannie remain popular choices.

So who is it? No clue. We'll guess Stephannie and Jessica. With 18 people left and 33 days to boot them, they'll have to resort to double boots and shorter episodes sooner, rather than later. So it might as well be now.