I do feel sam need some love with def.
Chiten is only instant button with 25% def and 5s only
Ogi Namikiri require casting 1,3s and 2 target for 8k shield
Kaeshi Namikiri require use Ogi first and 2 target.
Oka restore 5k hp but require 2 combo + soten + target in 5y + server tick

drg,mnk,rpr and nin all has instant def and escape ability. sam has none XD.