Still can't find any 1st Lord or Master Lords online

On ranked, I mean. It’s hindering me from getting my last achievement.

I’m currently a 5th Lord. Are my chances of finding one better if I go:

Area (Region): Same
Rank: Any

Or should I switch one of the two?

Region: Any
Rank: Any

Quickest way to get lucky.
No need to create a thread for this.