I'm assuming you mean Enhanced NSD there. Giving it a 160% nano would make it useless against any class beside mine, and we can't have that now can we?
Nah seriously - a 160% check would render it useless beside for killing docs.
I don't like the nano, I think TL7 traders should have gotten more defense, this nano helps them little about the prof that "wtfpwnbbq" them and it only shift the balance against nano proffesions again.
That being sad, the drain is what they get. Do I want it toned down? Yes I do. Should it be rendered useless? No.
Wrangeline made a great post about the problem about traders and GTH.
Imo it the Nanodelta shouldn't drain but "just" disable the nano delta. The normal nano drain increased in tickrate. It needs to be either removeable by Virus scanners, or a shorter duration because 60 seconds is a retarted long time.
A shorter duration will also give the nano a better utillity because it can't be cast just once every minute.
Also it should have a higher recharge time, or a capped cast time to prevent it being spammed and making nanoresist useless. Considering trader have to kite a lot due to little defense it prolly is favoreable as instacast with a longer recharge.
And last... TL7 requirement on it allready! I don't get why funcom insists on locking a lot of "pvm" nanos to high levels only while refusing to level lock Trader pvp tools intented for higher levels.