When you reach Prestige 11 you can teleport to Act 6 experience zone.
➜ How to teleport?

On Act 6 there are 10 level zones in which you can reach up to +50h.
This will follow the same proccess as before, you will need to reach the maximun level to continue to the next level zone.
When you reach Hero lvl +50, you will need to use $prestige command to become Prestige 12. You will get back down to Hero lvl +1 and you need to level up to Hero lvl +50 again in order to use $prestige again and become Prestige 13.

On this zones the monsters will drop Essence of Balance and Crystal of Balance materials, that will allow you to craft equipment, fairies and more stuff.
As a recommendation, you should upgrade your Low Tier Resistances into Mid Tier Resistances that will make you even stronger againts new enemies and PvP!
NOTE: Zenas' jewelery are for PvP and Erenia's jewelery are for PvE
Also you should craft 45h Equipment and upgrade your Low Tier Fairy into Mid Tier Fairy.NOTE: You will really need to grind to craft the items shown above

NOTE: If you want to exchange your Essence of Balance into Crystal of Balance or vice versa, you can do it on this NPC
Act 6 also includes Farming zones where you can get a lot of Gold.