I'm in very low RH Co. and I use a 6500 Master cool in the barn. I'm also in windy Pueblo and I get a nice breeze when the door is open. The combo does nicely so I can run the rv AC, without killing it, when working inside the rv. If neither of those options work for you, I'd use a big exh. fan to get rid of the condenser heat and hopefully pull some cooler air up to the AC area.
Decades ago, the place I worked had some seriously overworked ac's in the puter room and production areas and I rigged up swamper pads on the condenser coils and sprayed them with lawn sprinklers during the day... The ac's and the people inside loved it. Later on, for a permanent fix, I built sub coolers with welded plate exchanger/Penn head pressure valves and used the oversized chiller plant water to subcool the liquid lines. Those were 60-90 ton rtu's.
Also in the 80s, some company built swamper panels to put around condenser coils with a pump system to pump water over the panels, just like a swamper. Like they say... when there's a will, there's a way... and I usually find it! Craig