MiddleTommy,
Run the first run as hot and as fast as your WPS will allow.
Al (803056) has commented frequently on this forum on the difficulties of passing fillet weld tests, irrespective of how good the welder is.
As noted above, angle is also critical.
Weld as if it is a 2F and not a 2G and ensure the arc is doing its job by welding fast enough to stay ahead of your puddle.
FCAW and GMAW (especially) are notorious for laying what looks like a beautiful bead but has no penetration underneath.
Hope that helps,
Regards,
Shane