@OvercloakdHamstr wrote:
I would advise you to use a class that has splash damage, so you'll hit multiple targets, and leave them for others to kill them.
Considering they are talking about assists and skip challenges, I would assume the assists are one of the levelling challenges for the sunflower. Assists are essentially given when you start firing on an opponent and someone finishes them off. Unfortunately, the percentage of damage is unknown... as well as if a 3rd player gets shots in has an effect on it is unknown.
As for skip challenges. You can pretty much get them in any sticker pack except the spectacular sticker pack. I've seen stickers for 1,3,5,7, or 10 skip challenges. I always get at least one when I buy the 20k sticker packs... but I have a full stickerbook. I don't know if that has an effect on the frequency that I get them. 1,000 coin sticker pack can have them occasionally. It's usually a toss up between those and the self-revives or team replays.