i think retreat not basis only from power . ithink its by rank (etc jonin, anbu and other else). Coz i always do with my 2nd id that have high difrernt power long timeago when i pair with 40k and my main 70 i still meet player with total BP higher then me sometimes 120 or event more. So i didnt think it basis from power and i had ever meet 100K and 90K but didnt have reatreat *on