...one (1) or more of the factors that the court may consider under section 8 [IC 31–17–2–8] and, if applicable, section 8.5 [IC 31–17–2–8.5] of this chapter.
(b) In making...evidence is sufficient, the court shall consider the factors described in section 8.5(b) [IC 31–17–2–8.5(b) ] of this chapter. (Alteration in original). “We review custody modifications for abuse of...this chapter. Ind.Code § 31–17–2–21 (alterations in original). Indiana Code Section 31–17–2–8, governing initial custody determinations, provides:
The court shall...