Also just remember part of the game is trying out different things and options open available to you. I think for a falkow starter there are 3 equally viable ways you could start:
1) haste soldier -> song sorceress (just remember to almost never spend the 1SP to revive her if she dies) -> Rapier Fencer
2) Witch -> Undine. This owns in crest. It's not as trendy in Folrart, but will definitely win you some games, and sometimes it will really hurt the opponent. Like if they have to use dragon breath to kill the witch, that puts you ahead by 1SP, so it's a win for you.
3) Any level 2 unit (single copy) -> haste soldier. This open mimics a cath -> ex wiz open that you see in some top tier WK files. Regardless of whether you have cath or not, there is a certain advantage to opening with a lvl 2 unit that you plan to sacrifice and starting with your main units turn 2 onward. Try it out!
If you try to switch up your SS, if I were you I would always keep that SP+2 first (something like that is essential to rush files) and keep Ladol SS 2nd or 3rd or 4th (Falkow rushes like that really, really need removal souls to deal with certain things).
The True Hero / Callonia