The original method of pyramid training involves beginning your workout session by doing a large number of reps with relatively small weights. For instance, you could start with 15 reps with a 135-pound bench press. From there, you would add weight and do fewer reps, which might make your next step in the “pyramid” doing 12 reps with a 185-pound bench press. In this scheme, you would eventually culminate in a set of six rep at 265 pounds and then end your workout.
While macros will differ a little from person to person, the general rule of thumb for keto is to keep carbohydrates under 5% of your daily caloric intake. As long as you avoid the foods mentioned above, you should be fine. Google “TDEE calculator” if you need some additional guidance on how many calories to eat. I’ve had success following this way of eating as it allows me to eat foods that taste great. There are tons of resources online as well if you need additional guidance. A quick google search should turn up a ton of resources. Hope this helps!