Some planes like alt, they use it well. Planes like the 51's, Jugs and p47's gain alot of speed quick with a short dive. Normaly I wont go over 10k in any plane. When Im low in any of the above planes, meaning... below 10k, I climb, even if I am in a low speed climb.
Im not sure, but I think auto climb in AH is the best speed/dist/climb rate. I might be wrong. Most of the time I want to just climb, and not gain distance. It gives me potential E I might need. It gives me more options than I would have had being on the deck with no alt to work with.
You dont need a ton of alt to work with. You can drag and sucker just about anyone into a coalt Co E situation. I've always found that alt's of 10-15k max are best to work with in AH.