Hey, the base of my question is, whether spending 20K on just promoting a hero as a skill fodder is worth it. I have 40K and a couple of viable options that I could smehow justify building.
R. Raven user - I already have 5* Sanaki (neutral) so I could promote Henry for her or I have 4* Lilina (*atk-hp). I'm not sure if a red raven user is useful when I already have a +3 TA M.Robin, but it would be a nice option to have. Sanaki is my only 5* red mage, because I had no luck on the other 5* only and I have three horrible 4* Tharjas (2x -spd and 1x -atk).
G.Raven user - either +def-res 4* Boey or 4* F.Robin. The logic is the same as for the red raven. Also worth noting that my only usable Green mages so far are a 4* Nino (neutral) and a 4* Cecilia +10 with normal gronnblade(+spd-def) who is used in cavalry teams. Having another green option would be pretty welcome for that reason.
Brave Bow user - I have S.Gaius (+atk-hp) who's really awesome and I would like to develop him further. I have a -atk gordin that I could promote as fodder for bow and I could potentially promote an LnD fodder if LnD 2 is not enough . The question here is, whether it's even useful to have a BB user on team, or if it's just a gimmicky build.
EDIT: It's worth noting that I have no useful Klein (only 4* +res-spd and no B.Cordelia)
Brave Lance Effie - i have a 4* Effie (+atk-spd) and she was always really helpful in certain situations. Having BL+ on her and having her as a 5* would be pretty good. The question here is whether BL+ is required or if the few attack points loss from a regular brave lance is enough to secure most kills.
You don't necessarily need to waste too much of your time answering all the sub-questions, just choose one of them in which you have some experience.