Ah yes, what better way to “ascend” one self when you have vanquished those whose views opposes yours and you have in turn collected what they left behind as reliquaries?
My thought of thinking was simply that Holy heroes will probably resort to something less sinister/devious to defeat their opponents, namely holy water, divine light, and nothing really under the table, and the dark is more like all’s fair in love and war and anything goes as long as victory is achieved.
Holy and Dark elements are opposite of each other in this game in that they are strong against each other. So the trophy from defeated foes theory would work.
For the other 3 elements, since they form a triangle, are you the opposing element for the element you are strong against or weak against? Blue -> Red -> Green -> Blue again.
My thought process in the ones currently for the other colors are that they are generally fine as they are.
Green (Sturdy Shield and Msterious Tonic) - The shield is made up of wood, and Mystic Tonic for magicians / elves / woodland spirits (mixture of ingredients found in ancient, deep forested woods).
Blue (Warm Cape and Farseeing Telescope) - When you are training grounds is in the icy north, warm clothing is a no brainer. As for Telescope, the ice and snow kind of make things harder to see, so a telescope is needed so one can spot impending icebergs or other forms of dangers.
Red (Hidden Blade and Mystic Rings) - Honestly, I could see Hidden Blade being a weapon slightly towards dark because it is hidden until surfaced, but Trap Tools is already a pretty good one for the dark and hidden blade, though cane seem underhanded, can save the life of the wielder in the last minute. Mystic Rings I had thought would be perfect for magician heroes, but since the ascension is dived in categories by element, not character and there are already some magician type fire characters, I guess it can still go here.