+1 to everything Yolo said. But I am going to add some specifics.
1. Boxes yes, but more accurately gold item boxes. If you don't plan on spending money on the game, the best possible thing to do with tokens is save all of ones you earn from leveling and spend them all on gold item boxes,
while they're on sale. It may be a few weeks before the next gold box sale, but trust me, it's worth it. 5 items with a 15% chance of each card being a mythical item. If you haven't noticed yet, this entire game revolves around the attaining of mythical items.
2. You'll want to upgrade your torso first yes, but not to the maximum level 16. To give some perspective, it takes about 538,000 fusion points to get 1 level 30 torso to maximum fusion, or +75 health. I would recommend getting your torso to level 6, then start to invest it into your drone, then primary weapons #1 and #2, then maybe legs.
3. I was level 30 before 2v2s and 3v3s were implemented, so I honestly don't know (I'm currently at over 2 million exp

). It could be that you attain the opportunity to play at 2v2s at level 15 and 3v3s at level 30.
4. As Yolo said, they're just a conglomerate. As a a low level player I worry about being in a top clan, it's a long and frustrating grind to get to that level of play. Trust me, I'm in a top clan

As for now I would make a clan for you and your son.
5. Sadly never, and the developers have said so many items. Definitely keep every mythical item you receive though.
6. As stated by Yolo, they make that type of weapon on your mech deal 30% more damage. Very useful.
7. Complete waste fusion points. Basically it's a hole that you throw fusion points in, and get a mythical item back. But here's the kicker, that item can only be used in some many battles, before it "breaks", disappearing from your inventory.
Good luck!
