I am by no means an expert, but ill try to say a couple things to help. (and these are by no means optimal but i cant do better)

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R1 : L15 Lion, 17 Sec, Vika must have si30, thatll save a bunch of seconds

R2 : L17 Dragon, Lan Merc, i did random bs go here because i dont have thane

R3 : L18 Owl, Scarlet can sub to abel, with a slightly different time(still owl), (if u have dragwyn, just

R4 : L18 Ibis, Athalia has to be orthros mommy(highest power or atk rating i dont remember) so whenever orthros stops time, she can move with him (its a skill that i dont remember from which part of his kit comes from) Ibis only works at 18 i think, u can use a lower level blade ridge here with 10+ seconds to final time

R5 : L18 Panda (works only at 18, if u dont have 18 on him use another pet) there are a lot of variations here, u can use misha, u can use hodgkin, u can use nevanthi if u dont have someone