My first proposal isn't really a new temple, rather a variation on the current duel temple. I propose a Temple where temple points are scored equal to the glory gained in duels initiated by the player. No points are gained *or* lost if the player loses the duel. Only a player's first three duels against a particular opponent are counted.
The intent is to shift the emphasis from sheer volume of dueling, which gives a lot of advantage to courage trophies. Smart duel selection becomes much more important. (Picking on that player rated higher than you, but who has a terrible build, for example.)
Top flight studios with courage trophies can still do more duels, and will have a bit of an advantage. But this is likely countered by the fact that top level players have fewer opportunities for big glory gains. (There just isn't anyone above me with a terrible build anymore, for example.) So this is a subtle handicap that should allow full studios of newer players to compete well.
The current duel temple, with it's emphasis on wins and sheer volume of duels, encourages what I call 'bunny killing', picking on players who have no chance whatsoever. But focusing on glory gained, without penalizing failure (other than the loss of courage), should encourage players to be much more aggressive about who they attack. Killing a bunny might be 100% chance of taking 10 glory. I should take that 50-50 chance at 135 glory, instead.
The restriction regarding the number of attacks that count is to prevent two opponents with 50-50 chances at big glory from racking big scores simply by counter-attacking each other incessantly. You have to find and defeat multiple opponents. Top level players will have difficulty finding that many lucrative opponents, which is part of the handicapping.