A race against time

Farm the 30ap ember dailies quest and burn all the silver along with your unwanted silver servants and CE's you summon. If you get really desperate you can burn the gold embers too.

Also if you are going to try to summon Merlin, Quetz or Enkidu you can burn all 3* CE and Servants that you obtain from the gacha

600 is doable. That's 200 3* servants (each is 3 MP) or 600 3* and 4* embers. 30AP quest is 8-9 embers. You could use FP to summon 3* servants and embers and farm the rest. However, you also have the Babylonia singularity to finish, which rewards 30 SQ if done by 12/20. I would eat some apples and finish the 600MP farm. One story quest in Babylonia, around chapter 15, grants 40 gold blazes. So that helps a bit. :)

If you have bunch of Apples then... just do it! I think you're able to make at least 30 MP per day

Completely doable. I was at 3600ap. Blew ~25 apples on the 30ap ember quest. In two days, I got lunchtime.

By my calculations you need about 37 MP per day. With. The double golden apples dropping that means you should be able to clear all of the dailies for 30 plus burn the Silver embers to make up the difference.