((Only two left on BB))

((Make a Perception check, Bolt?))

24

BB smashes the two remaining skitters then, or rather just one since it skitters out of the way of first swing only to get nailed by the second, follow up swing.

To hit attack 1: 8

To hit attack 2: 26
Damage: 18

He will then turn to the last skitter,

"Ya, your turn next. Shuddup."

BB mushes one of the skitterers, while Bolt can see a faint drift of dust atop the ridge where the Robed One vanished, but doesn't have visual on them, presumably they have retreated over the ridge.

((May not be able to gain the top of the ridge this turn, moving or staying put for now?))

Move.

The skitterers swipe at Bolt but miss, she's able to make it nearly to the crest of the rise, and can see the a plume of dust hanging in the air, she's just able to catch a glimpse of movement that drops below the rise. It seems they've been hightailing it out of the area for a bit now.

The skitterers fail to hit, and are seeming a bit uncertain about hanging out to get whommped, but are buying what time they can. The two that had been on Bolt dash after her to harry her departure.

Gramps: 18 (disadvantage on saves, disadvantage on attacks not vs a skitterer)    <-------<<
Black:   (disadvantage on saves, disadvantage on attacks not vs a skitterer)     <-------<<
Larry: 12 (disadvantage on saves, disadvantage on attacks not vs a skitterer)   <-------<<
Bryn: 8    <-------<<
Keller: 8    <-------<<
Robed One: 7 (-115) (invisible, location suspected)
BB: 5 (disadvantage on saves, disadvantage on attacks not vs a skitterer)
Bolt: 2 ( disadvantage on saves, disadvantage on attacks not vs a skitterer) 
Skitterers: 2 (-10/-6 || ?/?/? )

Gramps hops on Black ordering him to move after Bolt and the Skitterers.

In the meantime (as move happens after Gramps turn) he throws a firebolt at the skitterer going after Bolt:

To hit 21 for 11 dmg.

If Black is near an enemy anytime during his turn he'll attack; otherwise he dashes.

in case of attack: to hit 11 for 4dmg.