While going through different players and choosing who to attack, it is a good idea to change the magic or troops depending on player defense. But choosing it a bit annoying. When tap on troops or magic you have to scroll right or left to find thing you want to use.
So when requesting a insta-troop there is a good way to choose type. Pop-up with icon of troops. Such idea I think would be also great to use on Equipment. Pop-up with icons of magic and troops on Equipment will be much convenient way. Easy and faster to change.