Is there a way I can farm these efficiently? Most of my doll skill levels are around 5-9 and having a hard time training them all to max level. I feel like I can only train one or two dolls during Data Mode days.
Short of just throwing your credit card at it for bonus data from the shop it's always just going to be a gradual process. The best you can really do is just get your data team to the point where they can get as much data from a single run as possible.
Ideally you just prioritise your main teams in order of importance while everyone else caps at level 4 skills for a while.
My farming echelon currently sits at around 35k effective power, so each run of data missions give ~217/96/48 data packs. Leveling up from 8 to 10 does require a fair bit of waiting and I don't usually train a whole lot of T-Dolls at those levels at once, but the lower tiers give enough data for very little energy cost, that I consider farming them to be reasonably efficient.
