I would like to be able to cycle separately through my

(a) agents (diplomats/spies/assassins/priests/princesses/merchants)
(b) fleets
(c) armies

using a hotkey. At the moment I can cycle through my settlements by selecting one and then using [ and ]. However, if I select an agent, army or fleet and use ] or [, the game cycles through my all my agents, armies and fleets. I want to be able to select, say, a merchant, and then use [ to cycle through all my agents only (not armies or fleets). Cycling would work similarly for armies and fleets.

I'd enjoy playing the strategic game a lot more with this change!