I think it should be based on level, not the different pvp arenas. IE 30 has the lowest fort allowed, 90 has the highest/current cap.
If we did it based on arenas well it would definetly put everyone in one arena, like the previous post would result in only whitesand starting regardless of level...JS
This idea is imposible because people ready +18 in all brackets.
They even +18 they gears in lvl 30 bracket lol.
There are way to make it posible but i bet geared people never want it happen.
-Down % defend and attack add of each fortification level to +2%
-Limit number of fortification = half of lvl of gear , for example lv 30 gears only +15 at max and lv 90 gears can +45 .
It a solution for high geared player in low lvl brackets (mainly 30 and 40 , but the OP players will lost 40% gear power lol) But people ready +18 in 30 still have 6% more than +15 player .
This way you can make pvper in low brackets (30&40) happy enjoy they game and high brackets (70 to 90) have more goal and work , give they change to spend they unlimit gold and make them more bright.
Add something Like after +30 , they get change to to lost fortification level when failed and you have to spend more AP for master stone to keep your gear success. (aeria will happy if this happen lol)
But this have to do now or it will late when time pass hahaha.
There are other way too , but to me this is best solution . Of couse it just funny talk so don't mind much.