So there's an upcoming Challenge Mode. We don't really know what it entails, but there's going to be a scoring system and chances are you'll be able to score more point by killing more things faster, because that is how score systems in videogames tend to function. The challenge mode is going to feature rewards for 'exceptional players', so it's in the best interest of those participating to perform as well as they can.
That means throw away your winmillion.
Iron Slug? Vendor it.
Shard bombs? Enemies not taking any damage half the time is not efficient, discard them.
Catalyzers? Probably worthless.
Any armour that does not start with "Chaos"? Not worth a damn. In a PvE game where there is a "glass cannon" set and a bunch of sets that are not "glass cannon", the "glass cannon" set will always perform the best for efficient killing and higher scores. Chaos or bust. Good luck getting a slot on a competent team without full chaos or a black kat cowl.
Drakon user? Better open the supply depot and shell out for a new sprite. An efficient team has no room for skills with 40-second cooldowns that can be completely gobbled up by a single, shielding mecha knight or a wall behind the user. There might be some room for seraphinx users to use angelic aura for the purposes of bypassing spike-floor puzzles, but this'll mostly be a Maskeraith-dominated affair.
Not even Lockdown is this narrow when it comes to viable equipment for winning. You can make meaningful contributions to the opposing team without wearing any gear at all, but this won't at all be the case in Challenge Mode. So I ask this: Is gear going to be balanced at all or should we be naming this mode "Chaos Brandish Race" and be done with it?
I wouldn't be surprised if the challenge mode encourages something other than Chaos TBH.
Oh people will always try to brute force Chaos into everything. However there is only so much survivability you can give up, especially when the challenge ramps up.
EDIT* weapons on the other hand... Yeah...