I wanted to add Rattray’s Bagpiper’s Dream to the list of aros that seem to arrive in the tin, and work well, on the drier side. ETA: and Mac Original Choice.
I've come to learn that I enjoy all tobacco dried to some extent. Aros are usually dried out the least, but even the goopy ones are ok when dried a little. Even after a few years, I still need to experiment with levels of dryness. But IMO, better too dry than too wet.
I tried to dry some Sutliff Creme Brulee, and I realized it is impossible because it is not wet but very oily, you can hear it sizzling in the bowl while smoking. It is impossible to stay lit for a long time but it actually burns cool and the taste is also good.
I have found a lighter pack also helps a wet aro burn better. As others have mentioned corn cobs seem to handle more moisture better than other pipes but not always, I have a Dr. Grabow Savoy that handles wet aros as well, if not better than some of my cobs. Drying out in the microwave works too but I have experienced some flavor loss with some blends like Captain Black White and P&C Anniversary Kake. I really haven't found a single universal way to smoke all aros. I experiment with each one to find which combo of pipe and/or drying method and time works for it and just repeat it each time I smoke that blend. Usually I have found the simple light pack method has given me good results with all aros and solved the biggest issue of constant relights. Towards the bottom of the bowl I sometimes lightly stir the remainder tobacco and do a good relight to dry the stuff on the bottom. Hope this helps.