Most engagements outside of cities will happen in daylight, at a range of 100-200 metres and as part of a larger fighting force. Most of the killing today is done by various artillery and air power, to a lesser extent machine guns.Scorpion wrote: If a conventional light infantry squad faces off against a PA'd squad, and both are capable of dealing damage to each other (let's say the LI squad is armed with Kords and Barrets, for instance), the squad that prevails will be the one that can avoid detection and remain hidden the longest. The human body can lay silent and hide behind rocks, grass and small irregularities on the ground. PA will be noisy and volumous, the exact opposite. Frankly, the only way I see PA working is in assaults to prepared positions, where the elements of camouflage (which are essential inna woods) are not a factor, and where resistance to fire is paramount.
My exact point was that an army fully equipped with powered armor will be far more resistant to the primary killers of a modern battlefield. Even if the armor does not fully protect against blast and shrapnel (and it probably won't), the infantry force become vastly resistant to supression that's supposed to pin it in place for artillery. On the other hand, when they're facing a non-PA light infantry squad, they can still supress them just fine for their own artillery to kill, while the LI will have to carefully aim and hit every powered armor suit with their sniper rifles, instead of pasting them all with a few 155 shells.
Realistically speaking, PA will be expensive, so it will probably be used as a support platform: if it's light and small enough to fit into buildings while still being immune (or close to immune), to small arms fire, it will be great for tanking for entry teams.
Outside cities, it will have less advantages over an IFV, but in rugged terrain it will still be good enough when operating in combination with light infantry.
Precise details depend on how the armor works and whether is actually is resistant to small arms or not.