Sounds good. It does seem like all the time you've spent in the dark night has "cleaned out" those nanas and you are quickly moving through it into EQ. If that's the case, then the challenge now will be to let yourself go where the meditation takes you. It can be like a fly trying to get out of the house: buzzing over here, then there, then low, then high, trying to find a way to fly out of the house. The most important thing to recognize is you don't control where the fly goes, you just go along for the ride. If you try to force yourself through the nanas, it will create a whole new bunch of greed, aversion, and indifference that you will have to clean up all over again.
So, sometimes you might find yourself in icky-creepy-crawly feelings. If so, you're in three characteristics and need to feel all of those yucky feelings leaving your body, almost like a purification.
Sometimes you might find yourself with pleasuable tingles. If that's the case, you are in A&P and you need to feel all of those individual tingles and let that power your mindfulness/concentration. Feel the pleasure and the tingles, how they feel, how they flow...
With higher concentration, the dark night will feel like a numb and kinda dumb cool bliss. If that's what happens, soak in that feeling. Go to the parts of the body that are numb, cool, blissy and put your mind there. Let those sensations fill your experience, get intimate with those sensations.
Sometimes you might go through a vipassina dark night without concentration, it will feel difficult and emotional. This is where you "heal" yourself by fully experiencing those sensations and emotions as mind objects. Don't repress or avoid, but also don't identify and react. "This is what the body feels like in fear. This is what the body feels like when it is disgusted. This is what the body feels like in misery. This is what the body feels like when it desires deliverance." These are patterns of emotional experience that are in you, but are not >you<.
Sometimes it seems like all of your reactive buttons are being pushed. A single feeling or thought makes you want to react with a whole new plan. You want to change your practice, your diet, your friends, your job, your life. Be careful! Don't get sucked in. But also don't repress or avoid what happens in reobservation. "This is what the mind and body does in reobservation. It freaks out! But I'm just going to let it freak out and watch."
When you find youself in equanimity, allow yourself to rest. It might feel a little like mourning initially, your heart soft. Wonderful. Now settle in and let yourself soak in equanimity. Your body might resist, unconsciously wanting more drama. Or you might find yourself tuning out, not being used to living in EQ. It can be helpful to soften the breath and do very slow noting on each exhale. "stillness, spaceousness, worry, relief, calmness, confusion, relaxing, softness, clarity..."
You might rise up and fall back, in and out of EQ, that's fine. You might have "big" experiences of A&P again or dropouts or near-misses in EQ, that's fine.
Keep a consistent practice going and you'll eventually find more of your sit in EQ and the equanimity will begin to color all of the nanas. Equanimity means fully experiencing whatever is arising, without reacting with greed, aversion, or indifference. Don't worry about reaching stream entry, that happens by itself. Just keep practicing and allow yourself to soak in concentration states and make a home in equanimity. And because where you go when sitting is beyond your control, mostly keep practicing.

Re: giving up tobacco... It's really hard for me to advise. In general, if you slowly cut back your dose and let yourself feel the symptoms, you can use that as more training. You can feel the sensations of purification as if you are in three characteristics, sometimes difficult to feel but also you know that it is healing your body. You can also see how addictions are very much like reobservation: a sensation of withdrawl creates a whole pattern of trying to do something about it, in this case it triggers the wanting and imagining of having the drug. But if you can see that if you >feel< like you "need" it, actually you don't -- because if you truly needed it, you wouldn't be having that experience -- you would either be using the drug or dead!

So you don't "need" it, you just want it, and if you just want it, you don't need it. You can kind of see why renunciation can support practice. It's good training for meditation. Heck, it is off-cushion meditation.

Just pace yourself and don't try to go too far too fast, just like sitting practice.