This 3 (Priests, Surgeons, Spies) units should be more in the game but because the are so expensive or weak or they need cards for being more playable and nobody wants to sacrifice some other more usefull cards, so this is how I would improove this guys;
There should be this Golden card (Advanced Church) that should do as the same as Master Surgeons and Agents card (this 2 cards should be removed)
This wouldn’t be enough for people use this card or this units, so my proposal is that surgeons, spies and priests should cost 100 gold, no population cost and a limit of 10 priests (like Spanish missionaries), 15 or 10 assasins and maybe 5 surgeons.
Maybe this Advanced Church card should include that all basic technologies should be a bit cheaper? (maybe this is to much) but of course this card should improove HP of the building and a faster rate of building it as the other Advanced cards (that almost no one uses also) work.
And Agents should get range damage (with the gun as the illustrations suggest) and as me and other players has suggested.
Even tho I think not to much people would use this card anyway because this fellas don’t win wars (games), they help a little but should help more so there’s more strategy in this STRATEGY game.
thanks for your comments.