It's not just low float to knockdown that's rare.
Go onto your 'ninja' tab and search by "pursuit status: knockdown". I guarantee you a whole slew of ninja will show up. And of those ninja, a good number of them are popular f2p ninja, like hinata, GNW Kank and Neji, Tobi, Kurenai, etc.
Now, search for ninja that pursue low float. There isn't a lot. The four that are even slightly viable are Kakashi, Sasuke, Tsunade, and Suigetsu. Of those, Kakashi is basically High float to knockdown divided into two skills and Sasuke is basically High float to repulse divided into two chases. Very, very few free ninja chase low float. And that's not even counting the number of ninja if search by "create low float".
Kirin's valuable because it takes one of the rarer status' and changes it to a common one.
This post was last edited by DraconusNex at 2016-10-21 05:24