Prioritize Reviving Your Teammates
The Archon’s Forge challenges are pretty similar to the Nightfall missions in that you have to be revived by a teammate if you happen to die. Of course, you can also self-respawn. However, the important thing to note here is that if you choose to self-respawn, or if your teammates fail to revive you for any reason, you will be kicked out of the challenge, and you’ll end up at the observation deck outside the arena.
This means that you’ll have to use a Splicer key to get back into the challenge. While the Splicer Keys aren’t exactly super rare in Rise of Iron, it can be a hassle if you don’t have any of those on you. If you don’t have a Key, you’ll be forced to sit out of the challenge and you won’t receive any rewards. Your teammates will also be one player down for the rest of the challenge.