I personally would not try to deadlift. A few light sets won't really set you back, but I would rather be spending my time and energy elsewhere.
When I do Smolov, I generally don't get the full 13 weeks because I'm a little bitch. But I like working heavy, joint friendly exercises into the program.
For example, I might alternate upper body work and heavy ab work after squatting.
3x5 bench with a football bar
3 sets of ring pull ups
Optional arm work
Two different heavy ab movements--roll outs, decline sit ups, leg raises
Something for the upper back, probably face pulls
Repeat Day 1, or work the opposite planes
Repeat Day 2.
If you're doing Smolov to get your squat up, then focus on getting your squat up. Most days you're not going to want to do jack shit after your squats, and that's fine. Your others lifts will be fine; hell they'll probably go up after squatting for 13 weeks.