Your welcome and thank you
Sometimes yes, But I didn't add Banshees to the enemy list because Banshee encounters in campaign are slim to none and the only time you properly engage them is when you have a vehicle of your own (Sabre, Falcon, Scorpion, MAC, and so on) to give a level playing field
Thank you
Its when your encounter different ranks, you'd learn of the shielding of your enemies and work on a proper plan to drain it and go for the kill
The Plasma Rifle and Repeater work in the same fashion, just that the Repeater has the vent function that helps in a fix, you can shot a few rounds, pull back and vent, so you can quickly get back into it before the enemies shields recharge to full
The Warnings are mostly intel on them, to show what attacks and tactics the target is capable of, so you can be ready for what they do, and yeah (though haven't had a go) It can be useful in the LASO. Whenever you do LASO next or don't, it's always useful to "Know your Emeny"