All in all, this seems to have been a success. Lots of feedback too, which has mostly been constructive and helpful. I have a huge notepad full of suggestions and observations.
Notepad, really...?!?

Joking aside, a lot of good ideas were heard from many people, not many to actually repeat but a few which i find crucial for the next event(s) to be better :
[1.] Unless a reward is given to the top 100 killers (or 250, or something) for their insane number of kills, i doubt that the next global event will have that many kills...
[2.] More players would happily burn their stamina for rewards/medals/fun if some kind of doubler was used (it's one thing to burn 20k stamina by 16/kill and another by 1/kill) (someone, can't remember who, proposed a special doubler potion that will apply only to the event enemies, maybe even invent-able from the drops of the said enemies)
[3.] Another thing already proposed by a lot of players, use a higher required number of kills for qualification... either a solid 2000-2500, or a logical 500/extra tier looked logical and achievable when i read them.
[4.] Don't overlap the with LE events, unless the LE event is more limited (14 new LE's?) or their kills stack... A few more good ideas where dropped on this subject, with the best one to be reach x Tier for the LE's to spawn...
[5.] Add Guild Quests and related rewards and medals so that we can see who has the bigger stick

As for a few ideas :
Make the "foot soldiers" give out a bit of xp and gold maybe...? Not that it wasn't proposed by a few as well, but i believe that more would be satisfied if they at least got a bit of xp for all that stamina and gold sink...

( a probable code for that would require too much work, unless it would give a standard 10 gold and 0.01% of your level to be translated into xp depending on player's level ? )
Add to all players a 10th equipment slot ( like a cloak or tattoo ? ) but make the equipment extremely rare to drop from the event enemies ( maybe even code it so that buffs don't affect their drop rate ? ) as an extra motivator to kill more? And make their graphics good for the bait to work

A bit more thought on that would be to add a few of them, make them to not take space in the backpack (something similar to components maybe?)...
...Also, they could give a bit of stats/enchantments/passive-buffs, nothing too much to make the game much easier, nothing too little to not make them worth it...?
...Nothing else pops to my mind, keep up the good work

My wife went into labour lol and my daughter decided to make a surprise entrance so guess i got my own better reward.
Congratulations hades!
-Narael