Question about disassemble

[nNightElf]

According to http://wiki.dfo-world.com/view/Disassembler
It said
Leveling up improves the following:

Cubes received (Up to level 7) <<<<<
Does upgrading after lvl 7 gain nothing just more durability and more repir cost?
Right now I'm level 9.

Also which item should I disassemble? Blue and pink (rare) ?? And what to do with Unique item?

[Falcone]

Upgrading past 7 will give you more durability and a very slightly higher chance to get many non-clear fragments at once.
Personally I disassemble non-weapon blues, all purples for souls and pinks that I can't sell for a decent (500k+) price. Right now cubes are so cheap, you could also just sell blues to npcs.