XP-powered Gear [Only One Command]

So, SimplySarc lately made a video about ideas
he had for minecraft 1.9, including an XP-powered
weapon. I really liked that idea and decided to make
a vanilla command block creation for this!

Only one command!
Click here to get to the pastebin.

To set up the machine, just paste the command 
into a command block and power it. 
That´s all you need to do. Seriously. 
You can also get the command block as MCEdit schematic. 

What does it do?
This machine adds XP-powered armor, swords, bow
and pickaxe to your world. While wearing/holding
them, your XP is getting drained slower or faster
with different tools.
Enchanted Helmet gives you water breathing.
Enschanted Chestplate gives you strength.
Enchanted Leggings give you regeneration.
Enchanted Boots give you speed.
An entire enchanted set gives you resistance without any extra XP-cost!
Enchanted Swords give you night vision, invisibility and a shield.
Enchanted Pickaxe gives you haste.
Enchanted Bows shoot arrows that gives several
negative effects to any player hit or closely missed by them.

Does it work in multiplayer?
Yes, this module is perfectly fine on singleplayer and on servers. 
Just make sure that command blocks are enabled on the server! 

Anything else?
Please note that this might still be unbalanced for survival.
Due to the fact that I don´t play survival too much, I couldn´t test it.
Please also note that the enchanted bow only works on players!
And when you shoot with the enchanted bow, make sure to
make a full draw, otherwise you may hit yourself with the effects!

Crafting:
Crafting works differently from normal minecraft in my modules.
To craft stuff, just throw the ingredients on the floor.
To enchant an item, simply put an experience bottle next to it!
The XP-Bottle won´t get used!
Enchantable Items:
Chainmail Armor
Iron and Diamond Swords
Iron Pickaxes

More modules!
This is only one module of an entire series! Check out the others here:
Autoplanting trees
Fireflies
Natural Regrowth
Smokepuffs
Quivers

Help me!
Please report any bugs or errors to me so I can fix them! 
What do you want to see next? Leave me your ideas! 
Anything I should add to this particular module? Tell me!