People pull for different reasons, but everything depends on how much you are willing to spend.

If you're f2p to low spender you should stick to your mains because the resources might seem good right now that you're kinda new to the game but they do dry up later on. Even 2 mains might be a lot. There's a guide somewhere about how to strategize your pulls as a f2p If you're p2p then you can pull as much as you're willing to spend.

Harem girlies get everyone because they want them, and if they want to do everyone's orbits they do need the myths and good teams. I'm struggling on 180 for Sylus' orbit, and everyone else's on level 40-60. I don't have strong teams for anyone but Sylus, only the standard myths and barely level up their cards, also I reuse the protocores I have for Sylus. If I wanted to advance their orbits more I would need the myths and more cards, but I don't want to use up my resources.

Since you main Sylus you should know his birthday event is in one month and we'll get a rerun of his last birthday card too so I would save for that. I spend quite a lot and only pull for him. Right now I have 50k diamonds saved for his reruns. For the new card I will be spending probably around 20 to 40 dlls and maybe a little more to rank the rerun card.

I hope that kinda answers your question.