happy chaos self-sustaining/endless blockstring (explanation in description)
Basically, you can loop your pressure indefinitely from anywhere on the screen as long as chaos is at his default/base resource amounts when you start. I started this video with no meter, meaning that happy chaos has self-sustaining blockstrings. It does come with some conditions, but they aren't exactly limiting in the slightest. Chaos has to stagger two times in the midscreen pressure and only once in the corner pressure in order to maintain the necessary ammo and concentration to keep the string going (I did two staggers in the video, but later found out you only need one long enough to reload 3 bullets instead of 2; I didn't actually need to do the 5K - 6K - 5K - 6K stagger). You can stagger in many different ways/places, and can even cancel into reload from your normals for around a 1-2 frame difference (c.S stagger c.S seems to be the same speed as c.S reload c.S). However, as seen in the video, Chaos can reload instantly after an ATR shot which significantly reduces his recovery. It reduces it to the point where he can trade with 5 frame normals with 5K. And all you have to do is stagger once or twice situationally between each generated super. That's the "condition" to keeping this pressure going indefinitely or until the opponent builds YRC/burst.
The long duration of the midscreen blockstring is due to ATR cancelling after shots.
TLDR: you have to guess when/where chaos is going to reload and use a 5f normal to, at best, trade with Chaos (dp's excluded) or he will do this forever. (I say 5f because I've tested all the faster normals and none of them reach far enough)