Please click on the link below and read the Pros.
http://mmohuts.com/review/iris-online
That's what makes Iris unique. Global cooldown, idk if it was actually used but I heard people said you once used it, caused huge DMG to the server.
As for my first suggestion, I'd say anyone log out while they're in FP would get ban from joining the next 1 or 2 FP. So basically, it works just like ban from participating in BF. Whoever has that ban buff on will not be able to loot the chest. And duration of buff should work like weekend event buff which means buff will run out when the time is up regardless of how long the person has been online. Duration should be 13h, 25h, 37h depends on how long you want to ban the player from joining FP. 1 additional hour is to make sure they won't be able to sneak in and loot the chest when their buff runs out cause if it is 12, 24 36 time different is about 1 to 3 minutes, so sneak looting is possible.
Cons:
- since it works like BF ban, you will get that debuff when you're dc-ed.
Argument against it: I notice no one dares to participate in FP with bad internet connection, so the chance of getting dc-ed is really small here compared to BF.
- there might be less people joining FP.
Argument against it: 2 FP per day. you can wait 1 day to do IDQ, 1 day banning from FP can't be that bad, and as I said, you won't join FP unless your net is good.
Ranking class with most advantage to least advantage, top down:
1. Wind Walker and Assassin, especially WW. Reason: high eva, low chance of getting hit =>high chance of getting chest. Additionally, mana shield is used. Especially WW because they have stun trap which last 5s, I'm not sure if it's actually 5s.
2. Saint and Prophet, especially Prophet. Reason: they have high MP, so mana shield => won't be cancelled while looting except getting stun/sleep/push however they can use trans. Especially Prophet because they have anti-debuff circles.
3. Templar and Champion. Reason: have 15s buff.
4. Sniper: some have decent eva.
5. The remain classes except Sharp Shooter.
Sharp Shooter: IDK where to rank them, but I'd probably rank between 1 and 2, so 1.5? lol Reason: sleep trap and decent eva for some players that choose eva build.
Second suggestion based on what I said above: looting chest will be cancelled even if the person has mana shield. So you can change DMG to MP works as DMG to HP.
Third and last suggestion: remove 1 minute announcement. You can make the chest be loot-able at any moment during the last 5 minutes, so people have to get in early because they can't know exactly when they can get the chest. Announcement when the chest is loot-able should be there to let us know rather than stand there and keep clicking on the chest.