Ideally, your scuba octopus setup should come with at least two high-pressure ports, and four low-pressure ports. If there are more ports available, this allows you to customise your setup further. That, said unless you plan on making some serious mods to your gear, 2 high pressure ports and 4 low pressure ports is ample.
When picking a regulator, try to go for a 1st stage that has the ability to attach all your accessory hoses in an effective streamlined setup. High end regulators’ first stages will be shaped in a way that let’s you aim the hoses in the direction you want, which makes your setup more streamlined and simple whilst also preventing hoses from getting twisted or tangled.
You’ll also find first stages that are designed with some ports on a section that swivels, kind of like one of those rotating turrets on the Death Star. The function of this isn’t to take down rebel scum, but to make it easier to get the hoses where you want them whilst also giving you more versatility in your setup configuration.
You can read more about regulator hoses and types at Simply Scuba.