So here is an easy way for blizzard to balance and make Diablo 3 arena possible without having to redo the entire game.
This entire fix revolves around items being useless in PVP and being used simply for vanity. First of all they need to apply a second advanced tooltip to all abilities.
The original is seen by holding Ctrl (Regular damage %s) and the new one would be seen by holding Ctrl + Z (PVP Damage %s) Secondly they need to make all abilities do a % of a players max health in PVP (this number will not scale no matter what) to avoid one shots and set the cap to 20% of a players maximum hp in 1 attack, so even if 3 players used all of their strongest attacks at once it would not result in a 1 shot. (3 x 20% = 60%)
I also believe having abilities do a % of a players max hp will make it easy to understand and avoid confusion while building a pvp spec quick. (if my magic missle does 5% of player's hp i instantly know i have to hit him 20 times to kill him with it) Example:
Third and last they need to reduce all CC by 50% against players or add diminishing returns and apply a debuff in the arena that removes all stats gained from items and sets all players HP to 30k for easy healing and damage skill balancing. Example:
What about healing and stats gained from spells and glyphs do they apply?
Yes, setting every players health to 30k and allowing skills to be balanced differently in pvp would allow for easy balancing of all PVP healing.
What about Legendary effects and critical strikes do they work in pvp?
Critical Strikes would work in PVP but still cap damage at 20% of a players hp in 1 hit however critical strike stats as well as Legendary effects from items will not work in the Arena (this allows insane legendaries to be made without having them be balanced for pvp).
Items in PVP would be strictly for vanity and to separate yourself from other players with armor and weapons with cool glow effects! This will allow for a massive arena community and create fair play for thousands of players to queue at any moment.If i do not gain stats from items in the Arena what are they for?
If Magic missle hits for 5% of an enemy player's max hp while you have no gear on it will still do 5% of an enemy player's max hp while you have gear on.
What about Passives that increase armor and dodge?
The numbers would have to be tested but each class would have a set amount of mitigation dependent on main stat. (Str users would receive base armor, Dex users would receive base dodge and Int users would receive resists)
Blizzard may even have to give classes all base stats even though stats wouldn't raise ability damage or health in pvp zones. (this would be for passives like Nerves of Steel that increase armor based on vitality)
But i want to attack my friend with my cool legendary build where can i do this?
Brawling would be the place for you everything i have listed would only be applied in the arena which would be a separate game mode from Adventure Mode in ROS.
Will there be a ranked ladder system?
Blizzard could add ranked and non ranked PVP with brackets based on Paragon levels and seasons that reset. (Every 10 Paragon levels would be a new bracket) Adding these rules would not only bring D3 PVP back it would make it accessible to even new players and would potentially put it at E Sports status.