False..I use this strategy in mid screen, but in the corner I am spamming f3. Klone allows it for free and your plus 8. If they don't get hit by the 3rd or 4th hammer I throw and repeat.
After only one type of knockdown does a clone give you ONE F3 nearly guaranteed, not spam F3. Then after the ONE F3 you get the clone is gone and no more F3s or clone for several seconds. SZ will not excel in high level tournament matches like this.