Once you have made it past level 300 now it's time to really focus on learning about properties. If you have made it this far you have already noticed that you are no longer collecting stat points anymore and instead, your gear is going to provide those stats you are needing.
Lvl 300-450
Properties: This will unlock your classes true potential as you continue your game progression and will determine how successful you can really be moving forward. You will want to make sure you prioritize leveling up your properties in this order so that you can guarantee you are getting the most out of this process:
Defense Tree > Attack Tree > Common or Element Tree
By starting in the Defense Tree you are ensuring that you will not die as easy in these harder Land of Demons spots but it gives you an added layer of protection going into PvP events. Then you will hit a point in your leveling where you can't fully complete this tree so at this point you would move on to the Attack Tree and start your journey there. Most people would prioritize the middle and left sides first and only putting the minimum points in there because you will want to come back to this later to finish it out. You are only buying time at this point so that you can start investing more into Defense. Once you max out the Defense tree then you are right back into Attack to max that one out.
At this time you will also get to expand your skills. Once you get to around the 4th set you will be able to pick up all of your opposite class specialization skills and we can do this by using Stat Reset Scrolls. These can be found in the Garnet shop for typically 500 garnets or the full stat reset for 2000. What we will do now while we are still in the Garnet shop is take a look at the requirements for the last skill for our opposite specialization and make sure we can get enough stats into that through resetting without blocking off our core skills. This will give you a whole new playstyle and your build will start to grow even stronger.
At level 350 you will start collecting Set Treasure Tickets and at level 360 you will gain access to the Set Treasure Wheel to get to play with Set Crafting.
At level 400 you will also get your first taste of Kundun Seal which is a 5 day event designed to allow the rest of the server to have a chance to catch up. While playing in this dungeon you will start to notice you are gaining an insane amount of exp in the Silver Dungeons and not so much exp if you are in the Gold Dungeon. This is because throughout this process your top lvl characters that are lvl 400 already will not be able to gain any levels for those 5 days. Instead they will start collecting a new resource called Potential Stones. This will be another form of upgrading your gear and like evolutions, these too will require a lot of gear to get the percentage rate of success up to 100%. However, you do not have to be at 100% to upgrade these. Without that, you will run the risk of failing too.
At level 500 is when the true game begins.