Removing Particular device pairs from SRDF Async

What is the best way possible on Symcli to delete a particular device pair from a SRDF Async DG? This should only remove some devices from the DG and keep other devices which are supposed to be part of it for replication. The main reason to ask this question is some times i experience the DGs go into "Invalid State" 

Example 

I have DEV001 to DEV010 in the SYMDG and i want to remove only DEV003 from it.

Which of below procedures would work best?

Current procedure that i use

symrdf -g R163_MYDG -rdfg 163 query
symrdf -g R163_MYDG -rdfg 163 disable -nop
symrdf -g R163_MYDG -rdfg 163 set mode acp_disk -nop
symrdf -sid 1234 -rdfg 163 -file R163_MYDG-deletepair.txt deletepair -force
symdg -g R163_MYDG remove ld DEV003
symrdf -g R163_MYDG establish -rdfg 163 -nop
symrdf -g R163_MYDG enable -rdfg 163 -nop

PROCEDURE 2

symrdf -g R163_MYDG -rdfg 163 query
symrdf -g R163_MYDG -rdfg 163 disable -nop
symrdf -g R163_MYDG -rdfg 163 set mode acp_disk -nop
symrdf -g R163_MYDG -rdfg 163 split -nop 
symrdf -sid 1234 -rdfg 163 -file R163_MYDG-deletepair.txt deletepair -force

symdg -g R163_MYDG remove ld DEV003
symrdf -g R163_MYDG establish -rdfg 163 -nop
symrdf -g R163_MYDG enable -rdfg 163 -nop

Straight forward answers appreciated