I think everyone should run a Smolov cycle at least once to get a feel for the rep schemes that build strength. It's not sustainable long term, but you will come out of it pleasantly surprised by your new PR.
What % of your max are your 6x6's?
I actually just found an article on BB.com that answers the question I had to the T.. in the second method
https://www.bodybuilding.com/fun/keep-weights-moving-up-2-foolproof-overload-plans.html
TECHNIQUE 2 THE TWO-REP WINDOW
When a more experienced lifter hits a weight ceiling with a step-based program, I like to give them what I call a "two-rep window." This progressive overload technique tweaks the number of reps rather than simply the load, and it's a good way to keep moving along in a classic 5x5 strength program.
BARBELL BENCH PRESS
Say an exercise calls for 5 working reps. The two-rep window will allow for 3-5 reps. Here's how it would look for a hypothetical bench press workout:
WEEK 1 BENCH PRESS
- Set 1: 5 reps of 225 pounds
- Set 2: 5 reps of 225 pounds
- Set 3: 4 reps of 225 pounds
- Set 4: 4 reps of 225 pounds
- Set 5: 3 reps of 225 pounds
This progression cuts the set short at set 3, but still falls within the 2-rep window. Making this model work requires being able to shut out your ego and not make an attempt you're not sure you'll be able to pull off. All else being equal, I'd rather someone save a rep for next week rather than perform 1-2 questionable ones.
In this case, the trainee can make up the reps during the following week to keep progressive overload on track.
WEEK 2 BENCH PRESS
- Set 1: 5 reps of 225 pounds
- Set 2: 5 reps of 225 pounds
- Set 3: 5 reps of 225 pounds
- Set 4: 5 reps of 225 pounds
- Set 5: 4 reps of 225 pounds
The lifter performed three extra reps compared to the previous week. That may not sound like much, but think of it this way: That's
675 more pounds than their muscles were able to move just one week earlier.
Moving forward, the lifter would continue using the same weight until they complete all 5 working sets of 5 reps successfully. From there, they would increase the weight by 5-10 pounds and start the process over.