Make your own nano skills enhancing cloak which will also provide decent AC to protect you. That is the good news, the bad news is that you can't have someone else make the cloak for you (at least not completely). A very nice cloak for players who depend on their nano skills.
You can get the Necromancer Cloak from Necromances and the Pit Demon Heart from an Awakened Pit Demon, both which reside inside the Crypt dungeon, you can check this guide for details. The Bio-Comminutor can be purchased at the Pharmacy and Chemistry Tools terminal.
The cloak is a leveling item (right-click on it). It starts with being Reanimator's Cloak QL 100 and can be leveled to Reanimator's Cloak QL 150. It will add at least 9 points (and up to 11) to all your nano skills.
QL 150 Cloak can be futher upgraded using items that escaped prisoners drop. The exact process is explained here.