After seeing Costri's post "Duel", I decided that I'd finally put out my idea that I've personally wanted. Now, I know this idea has been discussed, so please just listen, but I believe this idea can work really well actually.
Details:
First Type: Duel
-This would consist of 2 players (random)
-The 2 players would appear in an arena, similar looking to a boxing ring
-Neither player would have their shield, obviously
-A countdown goes from 3, 2, 1, GO and then they fight
-It's best 2 out of 3
Second Type: Arena
-This consists of 4 players
-2 Players would appear in the arena, while 2 spectate
-2 players would duel, same as the first type
-The next 2 will fight while the first 2 spectate
-Then, the winners of the 2 duels appear in the arena and duel while the other 2 spectate
-The winner of the final fight wins crowns, more than in "Duel", due to more players
Arena is an idea so that you may watch people go at it, almost like entertainment when not fighting.
The problem on 1x1 in this game is that it ends way too fast without vitapods. Without shields it would end even faster.
To make it interesting, I'd suggest a +50hp vitapod; without a significant hp increase, dueling would be pointless and partially based on luck.