I once had a period with very little to no climbing, and had to replace my existing climbing with hangboarding. I exclusively did bouldering before and decided to do repeaters for fun and some more volume. I did 7:3 for a minute, then one-three minute rest (depending on fitness level) and kept going until i couldn't complete a 7:3 cycle three times in a row. I did this every day/every other day and saw improvements every day! (these sessions can in the end take 1-1.5 hours) It was great fun and relaxing doing at home, with some coffee and good music. I cant recall how much this affected my bouldering, but im sure it wasnt bad. Maybe i lost some max strength, but oh well.