Tome 7 Level 4 Optimal saving path

i think this path might work as well but you start it with surv challenges instead of killer, anyone correct me if there's a more optimized version. You end up saving 480k with this one too.

edit i did this for myself personally so it might look quite weird, if theres a yellow circle that challenge is to be saved, if there's red on it you gotta redeem it, first killer challenge i goofed.

My bad, you're right !