Recommended itinerary for all three Baltic capitals

Hi all,

I'm planning to do all three Baltic capitals in one trip some time in April 2026. Currently the plan is two nights in each, getting a bus to travel between them.

If you had to recommend me an itinerary, what would it be and would you change my timings per city at all? I could probably stretch to another day if deemed essential :) - I've heard Riga has the least to do.

Thankyou for any help :)