Multiple types sounds good. Don't know if it's been mentioned but will these cloaking devices have an activation duration or will they be always on, maybe shimmering when an action is taken?

I would think that the Octo suit could be an always on type given it's limited use across all maps. And since it's a pattern changing type of camo it wouldn't neccessarily give off a much larger electronic signature than perhaps a normal suit. Therefore, scanning equipment and skills would still be a viable option to counter, if you can actually see them. Skill in to it at level 4? Were you thinking this would be a dropsuit or a module?

The invisibility type I think should have a duration and cooldown period. When activated it should also give off a higher electronic signature given the field generated to cloak the wearer thereby giving the appropriately prepared opposing forces the ability to know someone is "there" but they wouldn't be able to see them until they started sprinting or opened fire at which point the cloaked merc, in the case of sprinting, would become visible and the module would cease functioning but would still require a full cooldown. If pulling trigger, or throwing a grenade, then they would briefly become visible; hazy shimmering and slightly distorted, but after the quick action was taken they would return to a cloaked state until the "active" duration ended.
A melee action would end the cloaking as well. Skill in to it at level 5. Possibly in two skills i.e. Infantry Cloaking Operation & Infantry Cloaking Operation Proficiency or something. I also think the modifier for any cloaking skill should be on the higher end as well, 10 or 12. Again dropsuit or module?

If both are dropsuits then I don't see an issue, but if one is a dropsuit and one is a module, or both are modules, than what would stop the use of both at the same time? Imagine being camo'd all the time then being able to go invisible every so often mixed with profile dampening skills and such and you almost have an actual ghost on the field. Fun if you're that guy but if your not?

Profile dampening and scanners and all that should work as normal for the most part for both types as the inherent ability of the camo and cloaking provides a much more tactical advantage of not being physically seen by the trigger pullers. As in all things there needs to be a counter.

A duration and cooldown would also necessitate planned action by the cloak using merc.
...that's my 2 anyway...

Cloaking should be very limited if they ever have it in. It also should be made so you can kinda see them (think KZ2)