I like the Hardlight shield. It provides good defensive options as if your shields go down you can pop it to buy yourself some time or get back into cover (especially if you were being shot at at long range). It can protect you from nearly any firepower if you notice something incoming (saved myself from scorpion shells). Provides good offensive options sometimes (equip shotgun and pop shield when noticed and start advancing on opponent).
I feel it has good versatility so it's my favorite. Granted it has its weakenesses (slow movement speed and vulnerable from other directions) but I feel those are fair concessions to make for it.
Here's the best use for them, putting them in front of binary rifle users and watch them waste their ammo. --- "It was plenty warm and I was farting continuously under the sheet, creating a kind of greenhouse effect." -Dwight
Plop it down before start fighting someone/people, you only need to strafe into it for a second for it to start regenerating your shields. --- They call me Spoke Wrecker.... Thizz iz what it iz GT-Spidux
I use Promethean Vision on every class because it's stupidly overpowered. I've used almost every other AA a bunch and none of them are as good as PV. --- YOU PAID FOR THE WHOLE SEAT, BUT YOU'LL ONLY NEED THE EDGE