First world problems

[SturmChurro]

I only have ARR Base game. I am on new server which give 100% more exp. I hit level 50 on my PLD and completed my class quest chain but way behind on my MSQ (still on lvl 30 quest and only killed the first primal). I also want to level a WAR as well. Given this what is my best options?

1. Buy the expansion and power through to level 70 on the PLD?

2. Forget about the expansions, start a WAR and make best use of the 100% exp since I don't know when that buff will end?

Any other ideas?

I know these are first world problems but ...

I just did everything on my Dragoon to 70, unlocking all dungeons and trials, etc. So when I go back and level another class I can go straight to each dungeon as I level.