It won't be the troops and their missiles and planes have better targeting. They'll be flying over your heads. Still, GTFO ASAP when shit hits the fan.

why would they; more realistic would be Romania and Ukraine deciding to disarm Transnistria on behalf of Moldova

There is little reason to go through Moldova because Ukraine and Romania touch in Budjak which landlocks Moldova. A little bit of the road goes through Moldova but is controlled by Ukraine.

So are they going to take Tiraspol in three days?

I believe that Moldavian central government is very cautous. PMR already plays ball so why rock the boat.