With the others taking care of most of the rats and the swarm as well, Dalnu switches tactics and takes the one remaining giant rat, throwing some electricity at it. Then she added a shield for good measure, just in case.

Spoiler: OOC round 2
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actions 1-2: electric arc on R1 (damage (1d4+4)[6], basic reflex save DC17)
action 3: shield (AC +2 for 20)