Chariot

An alternate to using the level 3 magnet is using level 3 statis field. It seems weird when you first hear it, but then try it. It makes all the jumps 2 times easier! Sure it may not be as fast, but I've only had to respawn twice and I'm almost halfway through the level! (if you are using two players it might still be better to use magnet)
Another advantage to using status field is you can fight off looters if you get yourself in a hairy situation.

Also, if you have a second player that you are playing it with, when you get to the 14th checkpoint. Pause, have player 2 exit the game, hit save and quit, go to Xbox dashboard, restart Chariot. Load Chariot up again. You should be at the 14th checkpoint with only one player. Now when player two joins, instead of the game auto-selecting the gadget he/she was using previously, he/she can choose whatever gadget they want! And I recommend sheild bubble.

The last part with all the looters is definitely the hardest. Since I'm a garbage tier gamer, I have to be clever about these things sometimes, so I just wanted to add in my strategy for getting past the end.

1. I was playing with a friend and he used the teleporter gadget thingy. This can make the ending WAY easier. It even helps with some other parts like the first skull area. I would just hold the chariot in place and he would jump up a few platforms and then port me and the chariot up. In other places it was useful to drop a teleporter and then if we screwed up and fell off the platforms he could port us back up instead of having to restart from checkpoint. It wasn't really necessary before the final room, though. While not necessary in the final room, I found it extremely useful given that I'm garbage.

2. The first tricky part was the bottom of the final room. You ride the rail down to the bottom, grab some gems, and then have a bit of climb with bat looters coming after you the whole time. It's tricky to fend them off while doing the climb up to the next checkpoint. Here's what we did. We took the rail down and did the climb and got the checkpoint first. Then my friend dropped his teleporter at the checkpoint. We immediately went off the ledge back down to the bottom and moved the chariot into the little ditch where all the gems are. As soon as the gems were collected he triggered the porter to take us back to the checkpoint. This is WAY easier than doing the climb with the bats coming after you and if anyone is struggling I recommend doing it this way. Note that you only have 30 seconds from when you drop the teleporter to when it expires (This is assuming you have it fully upgraded). So don't sit around. As soon as the gems at the bottom are collected you should trigger it.

3. The second tricky part is similar. It's the part at the top. with the gems in the little wheel right before the end. My first comment is that I found it a bit easier collecting the gems and then going up the left side of the wheel. The right side is really crowded with 2 people and the chariot. I went up the left side and then magneted up onto the top of the wheel. It was actually easier.

4. My second comment for the ending is related to climbing up the little platforms up to the top. I'm garbage and was having trouble with this without losing any loot. Once we got the chariot up onto the top of the wheel we killed the current wave of looters and waited for the break between waves. Then the basic strategy was that I would use the magnet to jump up a couple platforms and then even take the chariot up another couple platforms. Then my friend would jump up and latch onto his rope and pull himself up to my platform. We were having trouble holding the looters off while continuing to climb or while holding the chariot there. So he dropped a teleporter on that platform and I knocked the chariot back off the ledge and fell back to the top of the wheel. It's MUCH easier to fend off the looters on this large flat surface. We killed the looters here and once we got a break ported back up. Then I would climb another couple floors, he would kill any looters that started to come up, he would rope up to me, drop teleporter, drop the chariot back down to the bottom, and keep on repeating.

Also, all the numbers currently listed are what I had at each checkpoint.