Hi there I've decided to share every (almost! maybe missing a few) location there is on Treasure chests.
So here we go.
Tower of Insolence (TOI) Best to be 70+/53+
You can find 1 chest on every floor. From floor 1~12. The best lvl to be is around 70 since you can do all floors, and get a reward. But if you're around 53+
you can do first 3 floors.
TOI is Treasure Chest heaven, since you can open 12 chests in 20 min.
Lank Lizardmen Dwelings Best to be lvl20+
There are 2 chests! The first one is near port. The second one is near Necropolis of Sacrifice.
Ant Nest/Wastelands (port from Gludio to Ant Nest) Best to be lvl30+
There are 2 chests! The first is near port, the other in the middle of wastelands.
Plains of Dion Best to be lvl23+
There is 1 chest, it's near port or on the hill.
Execution Grounds Best to be lvl33+
There are 3 chests if I'm not mistaken. 1 is at the location with flower mobs :P
Second is near that RB(UP), second one is on the other hill (when you enter EG left)
The Forest of Mirrors Best to be 52+
There is 1 or 2 chests I'm not sure since I've done it only 2x.
It's near the RB (not cat)
The Cemetery / Blazing Swamp / Fields of Massacre Best to be 52+/72+/61+
1 or 2 in Cemetery
2 or 3 In Blazing ( hill, near rb (flamestone))
2 In FoM. (near cata, near BS but still in the FOM area)
http://i39.tinypic.com/2zp2qg8.jpg
Forest of the Dead Best to be 70+ and 74+
3 chests, all are near the destroyed villages, 1 (highest) can be mostly be found in the Cursed Village.
Seal Mahum Training Grounds Best to be 80+
Never done it so I can't tell about the location, but I have good info that 1 is there for sure.
Ketra Orc Outpost Best to be 78+
2 chests.
http://i39.tinypic.com/2lmmqfb.png
Varka Silenos Outpost Best to be 78+
2 chests.
http://i39.tinypic.com/iggrx2.png
Beast Farm Best to be 80+
1 chest.
http://i41.tinypic.com/mlle7k.png
Giants Cave Best to be 80+
There are 2 chests 1 is when you port from Aden to Entrance to Giants Cave (first room), the other is in upper (random rooms). Maybe even in lower but I've found it only in upper.
Seeds Cavern/Skakato Nest
Only 1 here.
So there you go.
I suggest making a macro /target Treasure Chests, and holding it down till chest pops out ^^.
As you all know respawn time is 2h.
If the chest is dark red it will only blow. BUT!!! If the chest is dark blue it will open just chance is decreased. Same goes with light red.
I made over 200m with chests and that was the lower ones. Imagine the high ones. So Happy hunting.
PS: There will be an annoying hero using cancel stick on you. Since he thinks he can have all the chests on lockdown. Think again huhu.
Make him go red, and gank him, and get epics. ;D
Enjoy.