too early to tell.
Almost all of them is external, pixel bot, and most, if not all, already had ban wave
The best one imo in this current market in term of aimbot performance is rijin, they had 1 prior detection last week, but it's ud right now as long as you dont use rage settings. And it's internal memory cheat too
How long will it stay ud ? who tf knows ? In this early stage of the game, most cheats will have more chances of getting detected as most of them are still in development/updating phase.
Try ask this question again in couple months maybe. You will have a more definite answer. But as of right now, I think rijin is the best option as we don't have anything as good as edenity or hyperflick updated for ow2 yet. So using it right now to have some fun is still better than using nothing at all or pixel external bot.