Please let me play multiple classes.

[Lithera]

DL and relic weapon will do you just fine in Coil and if you roll Coil with the backup class you'll get to Need the Allagan that drops for it. YOu could also be more frugal with your myth purchases. If you deck yourself in ilvl90 in the main armor slots you hardly need to upgrade your accessories to Hero's. This point would be completely moot if they had gotten Crystal Tower in at launch but unfortunately they didn't.

[Garnatian]

DL and relic weapon will do you just fine in Coil and if you roll Coil with the backup class you'll get to Need the Allagan that drops for it. YOu could also be more frugal with your myth purchases. If you deck yourself in ilvl90 in the main armor slots you hardly need to upgrade your accessories to Hero's. This point would be completely moot if they had gotten Crystal Tower in at launch but unfortunately they didn't.

I believe Crystal Tower is also a weekly lock-out, meaning you can't use it to gear if they use the same RNG system as they have for everything else.

So at best you can still only gear 1 class properly and then have 1 class that you sub-gear.

[Dano]

no one is stopping you from playin the classes, no one is stopping you from gearing the jobs, it's just a matter of time that you'll get everything eventually. It's entirely up to you and your group of friends.

if you want to make it faster and not deal with lockouts you can level an alternative character. The game is quite open ended on what you can do, you just need to be motivated to do them.