Hmmm, how about cooldown on Drains?
I.E: Drain A lands. Lasts on target Player for 3 minutes.
Cooldown A on traders NCU is for 3 minutes.
Same apply for Drain B. Only if target is player.
It would prevent on laddering and total cripple targets.
I repeat - only on Players, not NPCs!
I dont know, how much you have tested setups and proffesions vs trader, but myself, I did many proffesions and setup to test, whats good whats bad ect. We all know that tl2 enf (at 49) can get 1k NR (1150 at max buffed OS)which works, but its luck dependant too. Other proffesions are just borked. When it comes to BS/Duels/NW - most cases (95%) first drain does not much for dmg (it stops most from healing, raging, TMSing ect - takes all must-have-important-toolset), but weapons work - so there is always figting chance. Second drain (plunder for that case) stops most from being NanoUsable, and left them with some dmg - still, in that case, they can do dmg (not mentioning Engis/MPs, since they are petless there...) But problems starts on any (!) ladder, where trader gets 100% chance to drain (due attack nanoskills) and drains around 25-50% more in all skills.
Haveing in mind, I dont want them to be useless, I think its a good option. None target will be crippled in DMG like its in current state, and trader will need to use trick (root/some kite) to win its fight.
Once i watched few fights enforcers vs traders. I saw 47 lvl trader won 49 twink with AI gear, fully twinked in good stuff, and that trader was fr00b with silly Trainee. Fight took like 3 or 4 minutes, but you should see how this ENF was useless when hits with tigs were for 25 or something like that.
I will back for ladders. My enf can fight good traders from 0 point. I would say its 50/50 - skill and some luck involved too. But on BS, NW or any mass pvp, this very same trader with any predrains is just instakiller for me, and not me only. I bet none of you (!) was on tl2 BS, where there is 5 neutral traders camping lifts. There is NO FORCE in world, that they can be beaten - on this particular case, we (clans) had 4 v good enfs, 3 Jamed soldiers and we could'nt manage to win them (even if 2 were killed). Even on lvl 15, trader can easly ladder so much drains (while target is rooted), that most weapons are rendered useless (not mention about any nano skills).
And I dont care about one thing: 90% twinks traders that will whine "Omg, I am not wtf pwn anymore" - this issue needs to be balanced.
You should seen my face, long time ago, back in 2003 when I first time went on NW. There was lowbie Trader, around lvl 35 with Frost Scythe (just right after TOTW was opened), and my adv and friends soldier at lvl 45ish were pwned. Not only we died, but like 10 other ppl from West Athen Rangers - I asked myself... How the heck its possible? Then I checked NCU, saw drains for 250 skills and I was amazed, how the hell its (seeing req on it) possible.