Mehrak will stay out in front to keep his light shined on it so they can deal with it and will have some visibility. As Ayato is faster he'll try to cut off the offending arms as they try to grab at them both, using hydro blades to slash at it, figuring that may work better than a blade.
Kaveh will attempt a clean up using the vines/roots using dendro on top of that.
So both will stick to using their visions from home for now, rather than seasonal powers.