Guys, gonna drop some realness, all these sponsored people are trying to sell you stuff, or are so far down the hype rabbit hole they can't see the Sun anymore.
It is all about packing and body position. There is no magic one technique or size that fits all, you just have to be aware of what you are doing and notice what works and what doesn't. And no matter what equipment you have or how you pack, you are going to have a wonky opening every now and then.
Also, some of the stuff that migrates over from BASE is helpful, but they make sacrifices too that aren't suitable for skydiving. If you wanna talk BASE, there is BaseJumper.com for that. Otherwise, why isn't everyone free packing BlackJacks with mesh sliders on skydives? (Done it, it sucks).
You can wingsuit EVERY 9-cell on the market, that isn't geared toward swooping, from EVERY manufacturer, reliably. Yes some are more forgiving than others but there is no magic bullet.
For instance, double stows, sure they are good and I had good results until I started jumping a big suit, then after my flare slowed me down to hop and pop speeds, I've have better results single stowing; but that is just me, with how I fly and how I pack. Someone else on the same gear could have better results double stowing.
Another "for instance," I really like my semi-stowless bag, but I jump with some folks that use a traditional bag who consistently have great openings.
There is only one consistently important gear thing that comes up, bridal length. Once you get bigger than a mid range suit (Funk, Havok, etc) a 6ft bridal has a large probability of causing hesitation. Is there a diffrence between 9 and 11ft bridals, probably not, and you can burble both of them with a crap throw (seen and done it).
Learn to fly the opening and pitch properly, and also take a extra couple minutes to pack well and consistently, then all this wonky opening stuff goes away.
Consistently good openings I've had with 7 and 9 cells on large wingsuits include:
Navigator (don't ask, lol)
Spectre
Saber2
Firebolt
Pulse
Prime
Pilot
Storm* was wonky for me, apparently it happens to some folks, but too many people love it to deny it works well.
So demo a canopy just like any other and pick one that you like its flying and opening characteristics (not WS related), and if you can't WS it, the problem is you, not the canopy.