The rest I only use if I have to, but if a customer is happy with #1, #2 or #3 then I am unlikely to argue as they are easy to implement.
Ule a nile kpuru ìsì - amaara m naanị na m na-akpọ DAC # 1, # 2 ma ọ bụ # 3, ma na e mesịrị chọpụta nke nke bụ nke.