Honestly, I'll say what I always say - Play what you like. You'll always perform better on a Job you enjoy and have a good feel for.
As for balance - People make WAY too much of a deal over it. While there is one particular outlier (MCH), every other Job is more than functional (even MCH is) and aren't really being denied entry into parties, especially once the content is a few weeks old or more and people have geared up some.
Literally the only time it matters is within the first 1-3 weeks of brand new content, for world first race clears (which are almost always done within 1 week anyway), and MAYBE for Ultimates, where RDM will always be welcome anyway since it's so great at helping push Prog/phases.
So play what you like, ignore the community being a bit TOO hyper-focused on balance and the meta. Nothing's not viable, and people really need to step back a bit from that cliff.
