Need Help with hero Arena Triggers

I am making a 4 way team FFA hero arena. I want 4 way team FFA duels and a leaderboard that will show team kills for all players. Until recently I have been working on my own triggers and starting from scratch (As in not copying one of the hundreds of hero arenas that look the same) I want to make it so that the duel will end once there is only 1 hero left in the duel arena. How would I do that? I look at all the other maps and tey make it trigger by a unit dieng while the Duel Variable is equal to true. But I dont want the duel to end the second someone dies.. I tried this (The Team1,2,3,4HeroLeader is a unit variable which works fine for me)
Event:
A unit owned by: Player 1,2,3,4,5,6,7,8,9,10,11,12 dies
Conditions:
Team1HeroLeader is equal to dieing unit
Team2heroLeader is equal to dieing unit
Team3HeroLeaderis equal to dieing unit
Team4HeroLeaderis equal to dieing unit
Actions:
Run End Duel Trigger


Also, I am having trouble with the leaderboard. I want to make it show both individual kills and team kills. But in other hero arenas they add neutral hostile and neutral passive to show team 1 and 2 kills. I want it to show team 3 and 4 aswell. So how am I supposed to do this?
I tried to make 2 seperate leaderboards that flash back and forth, but it doesnt work. So can someone please help me?

Umm.. Hello? Can anyone help me whatsoever?!

wow thanx guys for all your help... I really appreciate being ignored for 2 days and my post left to get bumped down out of the forums.. SOMEONE in here has to know how to fix my problems.. I know it is possible.. and I've seen maps that have done it, but unfortunately they cannot be opened because of the map lock.. I am sure that SOMEONE here knows, so don't hold back I have and am willing to try anything..

Don't use a variable, us an array with the index being the player number. then make the condition:
TeamHeroLeader[player number of owner of dying unit] is equal to dying unit