Big IP DNS Different pools one using snat automap

The VIP that this IRULE would be attached to is using SNAT-Automap, I would like to keep automap turned on. The pool external DNS pool turn off snat automap.

when DNS_REQUEST { if { ([IP::addr [IP::client_addr] equals 10.10.10.0/24]) } { switch -glob [string tolower [DNS::rrname]] { "www.domain1.com" - "www.domain2.com" - "www.domain3.com" - "www.domain4.com" - "www.domain5.com" { pool external_dns_pool } default { pool internal_dns_pool } } } }