Unfunded Assassin Advice - HP Washing and Levelling

Having one with base int and one without is really a good idea. You'll have better funding by playing both. If you get bored of trying to level with int, swap. Get bored of higher level struggle, swap again. If you get your non-int high level and find that you really need more HP, that's all right cause you'll have so much progress on your 120 int.
I would highly recommend you use your non-int to aquire some Int equips though. Hope this doesn't sound like madness

 

Honestly, I was read the first sentence and thought that it was madness haha. Then I read the rest of your post and thought it was honestly a pretty solid idea. Kudos to you. I second his opinion.

 

This might be helpful to you as well

 

This especially to you.
What that guide doesn't mention (correct me if I'm wrong) is that it's pretty nice to be able to take two hits instead of one to survive. Just something to consider

 

1. Note that account sharing isn't allowed. So you can't use your friends account to leech yourself, but your friend can leech your character.

2. It's actually very smart that you are making two assassins! This lets you play the class you love in the early game, but at the same time not be completely screwed in the late game.

One thing I would note is that you should carefully choose your HP goal, go around and get some advice from some experienced NL players. You want to make sure that you prepare to get enough HP for what you want to do, because it's a very big investment to wash a character.