Pretty much every toon that is in the platoons is farmable with the exception of Paploo. Pao has been farmable since when.... March? April at the latest if i'm not mistaken. It's not like they're asking you to have him maxed out and gear 11 or 12. Just get him to 7* and leave him g1 if you don't care for him. Sooner or later most guilds will have a surplus of Paos and those slots will be pretty easy to fill. For ships that is a little bit unfortunate as well as a lot of ships in platoons are ships we can't farm reliably even with spending money. But over time TB will be easier, more platoons will be able to be filled up to get the better bonuses, and we'll all be getting 45 stars at the end of TB in a year or so who knows.