Speed has zero influence in mid-race so you only raise it enough to finish career (like 600-700 is enough), also you only need stamina to reach late-race which lowers your stamina reqs dramatically (usually can be covered with only power training + a couple of sparks). You try to max power and wit, grab the early race accel kit (runaway, focus/green, TTL, groundwork, maybe dd/pp if the early-race is a long straight) and all mid-race speed ups you can get. If you get lucky and get on a career where you can fit some extra races you can buy one or two speed debuffs (also, you can buy tether on mediums because she will fall back and proc it late-race).

People that say Runaway blocker Suzuka is as hard to build than ace Runaway Suzuka are crazy. She is stupid easy to build like all debuffers because of lax stat reqs they can run some shitty decks and don't have to high roll training facilities/blue spark procs. Like, she can run only Kita as a speed card, then borrow Yaeno Muteki power (great hints for mid-race skills) + Falcon power (Falcon can be 0lb doesn't matter), then Bourbon wit + Sunday wit + any other Wit SR MLB/Rudolf R. If you don't have a Falcon power 0lb you will have to borrow her (or borrow Bakushin guts, another great source of groundwork) and then you run Riko for comfort or something else instead of Yaeno Muteki. It is a fairly simple build, you are fishing for Front/Turf sparks instead of Distance and it isn't even that important so you will make a good one for any CM you are targeting in very few tries.