Legion Captains
After the establishment ceremony ended and the Reaper Soul Legion officially formed as an independent power, it is sometimes necessary to move out in formation and strut of the newly made power's might, but Davis didn't do something like that because there was no power left in this world his Reaper Soul Legion couldn't subjugate.
Of course, the three remaining Great Righteous Sects might survive the Reaper Soul Legion's onslaught due to their formations, but that's all. It was unlikely they could come out unscathed in an invasion of slippery yet powerful Soul Emperors and Soul Empresses. In any case, it was obvious in how they maintained supremacy with just their undulations alone, so there was no need to strut around their might.