Not really. in the time your LST completes one trip in one direction your C17 or C130 will have made at least dozen.An ice strengthened LST or JSS (Davies GLAM for example) is not a warfighter but will deliver warfighting capabilities. The fact that they would be "ice breakers" would give them the ability to move and not be the sitting duck. They would not be a quick response but they could deliver a whole lot more than air dropped equipment be it fixed wing or rotary. Also if the Chinese and Russians are serious about claiming some turf I'm sure they would bring along some air defense capabilities whether it be ship or ground based. Also, drones will figure prominently as they seem to be the new norm.