I've been looking for a more powerful card but non seem to exist. It's necessary for me to use a high powered adapter as I have a point to point network setup between 2 buildings using TP-Link bi-directional antennas.
Currently I use an Alfa AWUS036NHA. I can boost the power in my OS to 30dBm but the longevity of the device suffers. I have to replace the adapter at least once every 9 months.