I love TRoS and recommended the hell out of it to a friend a while ago (I don't know if she bought it yet, but she was really interested also!), and I was deeply intrigued by the TToW demo, so I chose TToW in a survey as it's my preference :)
But if you decide to go for BFF first, I'd want to support it too — I'm not sure if I'd give the same amount since I'd be way more hyped for TToW, to be honest.
I haven't chosen any scenes as reward tiers, not because I'm not interested, but because I hate being locked out of content just for not being on time or not being able to give as much. But I think that, e.g., special romantic content would be appealing to a lot of people, so that's just my two cents.