DNS Wide-IP load balancing vs pool load balancing

it looks like doing Topology load balancing of pools is not available, per https://support.f5.com/kb/en-us/products/big-ip-dns/manuals/product/bigip-dns-load-balancing-12-1-0/1.htmlunique_203808693.

I guess it makes sense, a pool could be distributed a crossed different regions, etc. I'm assuming I could create a custom iRule to select a pool based on geoip, but man that feels like more work than I want to do.

Anyway, if an idea comes to anyone where it can be simple and shared I'd love to hear it, thanks!