Should I roll to MLB First Sunrise?

Yeah seems like a really good CE, it increases only the Attack stat which is the mark of a good offensive CE, you should go for it but know when to quit rolling if it takes too many quartz

Be warned that trying for the remaining 2 copies of the 5* CE can take between 60-120 SQ on average and the extra 10% of NP charge you will gain for MLB the CE isn't worth it if you want the CE to farm (cuz you can use other CE's for the same job), so if you don't mind spending a chunk of SQ for the CE's then go for it, but if you think that it's better to save the SQ for future servants, then stop :D

I would say no since that sq can be saved for other servants in the future.

First sunrise is on rate up for Kintoki's and Ishtar's individual banners too, so you can roll for them there if you're interested in those servants as well. I need another 2 to MLB mine and I will be rolling on the Ishtar one in the hopes of getting Ishtar.