Hmmm. You could MAYBE split the ending phone call of Cloak of Darkness into three parts to wrap around Lair of Grievous:

Run through Cloak of Darkness in full, up to Ventress and Gunray escaping on their ship
Wipe to Kit Fisto in space, being called by Luminara and Ahsoka. (Though that’d mean he kind of comes out of nowhere.)
Early in the Lair of Darkness part, use the middle of Cloak’s ending phone call, beginning with Luminara saying “all is not lost”, Anakin suggesting they track the ship, Yoda saying “move fast”, and Luminara saying “I’ve already talked to Kit Fisto”. This would keep us mentally back with Luminara and Ahsoka even while we’re watching Grievous, and show that they’re essentially (indirectly) monitoring the situation throughout.
Remainder of the Grievous episode, ending with Dooku chiding Grievous for letting Kit Fisto escape.
We then have to IMPLY (but not see) a call back from Kit Fisto to Luminara saying he failed, and we won’t be able to see them react to the news of Nadar’s death.
Back to Cloak for the first part of the ending, “Gunray got away”/“It’s OK Ahsoka”, and Yoda saying “Shame about the treachery.” But they wouldn’t be able to comment on Grievous’ lair.
Straight into the third part of the ending, Anakin saying “See you soon”, and Luminara telling Ahsoka she’s a good kid as our final emotional beat before flying the ship off to a new adventure.

But that’s only if we thought the Grievous part worked.