clear only plays duelist + occasionally chamber
Riku has not been doing bad whatsoever in recent games, and his agent pool is a lot more flexible.
On maps where it works, DSG might try double duelist, while subbing in Riku for clear on others, since no matter how good clear is--Yay is...well... yay.
Otherwise, there's a strong possibility that clear gets benched altogether or yay proves everyone wrong on the sage.