Except aircraft carrier outrange battleship just like large UAV outrange mini drone. Btw that's also how those turkish drone outranged and destroyed by large wing loong 2 despite outnumber them.
Well, TB-2 is not a micro done. I'm thinking more on the line of an Israeli Harop or Harpy. But that carries one missile. Essentially a loitering reusable cruise missile that flies in a. swarm
Micro drones can have the same range as large drones. It's more about building a very efficient engine that can compensate for less fuel carried. Maybe a ultra efficient and light weight miniture turboprop or turbine electric engine or if battery tech improves, an efficient electric motor.
Body of the drone can be made using composite materials and as little as metal as possible. The missile doesn't even have to be powered. It can have little wings which allows it to glide to the target. Once the drone drops its only missile, it flies back to base automatically to be rearmed.
Try to reduce as much as possible metal parts in the missile as well. The body can be made out of plastic. The only metal parts will probably b the electronics and the shaped charge.