Separate Challenge Army - instantly changeable troops

A large reason for friendly challenges is to test out various ideas on army composition. For example, I want to try beating one of my clan members TH11 base with air. Can I do that with all drags? dragloon? lavaloonian? draglavaloon? Will one more hound help instead of more loons? To test these out during the relatively short time that my clan member can hang around and keep reposting his base all the while I am rebuilding and dumping troops is not really possible.

My proposal is that there be a separate army camp that is ONLY to be used for friendly challenges. The troops/spells in that army can be dropped and instantly added with zero build time. So, If I want to swap out 6 loons and add in a hound, I can do it instantly and then quickly do another test. What? That didnt work? Drop the hound and add a drag and two loons and quickly test again.

Basically, troops and spells should be able to be added and dropped instantly so you can quickly test out theories and strategies. And your quick challenge army should be a separate army from your normal army. You cant use your challenge army in war or raids and visa versa.

Considering the army used in friendly challenges is not actually expended and therefore does not cost you anything to run a challenge, making this change would not really impact the resource level of the game. But it would let friendly challenges reach their full potential by letting members utilize this portion of the game more.