drop/ Add questions

Hey Guru! Our league is tackle heavy and CB required league (2 safeties and 2 CBs starting). My starting safeties are D Landry and K Coleman, and starting CBs are L Webb and Trammon Williams.

1) For the safety position, Would you drop D Landry for Bigby, M Adams, or K Rhodes?
2) For the CB position, Would you drop T Williams for J Wilson, M Adams (both CB, S eligible), J Norman, J Jenkins or K Jackson?

The question is for ROS.

I'd drop Tramon Williams for Norman. He should be pretty valuable as long as he keeps the starting job.