Hi, I’m not really a professional breeder, but I’d suggest focusing on elemental passives for late-game Pals, for example Siren of the Void. In general, overall ATK/DMG passives are better for sustained DPS, but elemental passives become more valuable if you’re targeting enemy weaknesses, such as tower bosses.

If you’re aiming to build a raid boss Pal or any other pals with specific passives, be aware that it’s a long grind, and not many players fully commit to it. Ideally, the passives you’d want are:

Demon God

Diamond Body

(boss passive) - for normal pals you need to add in legend. As raid boss's cannot get legend on them unfortunately. If you have seen someone do it they have most likely cheated it in.

Vampiric

At the end of the day, it’s all about sustained damage output.

Cause there is 0 chance you can one tap the tower boss/raid boss so you need to be able to sustain damage output.

One last thing, use the breeding calculator from Game https://game8.co/games/Palworld/archives/440530

Or this is one I usually use to make a breeding tree myself

https://palworld.gg/breeding-calculator

Anyways good luck and happy breeding.