There don't seem to be any shields which offer much of a benefit, or fit the style of either gunners or bombers like the Thorn Shield does for Swordsmen.
Is this by any chance planned for the gunner update?
Swiftstrike doesn't count, that'll get you wrecked in T3.
It seems like this game has a hatred for both of these 'classes' when played as a pure role, as it's very often tedious to play as either one without swordman support, and even then, you only feel useful when your role is completely necessary for purposes of hitting things out of reach or crowd control, at which time all I hear is crying from the swordsmen, or they pull a valiance or blitz and do well enough with it.
I started this game aspiring to be a gunner, and there's even gunner armor (But none with fire resistance, ugh), yet once I reached that goal, I was left still feeling useless, as my teammates sweep the floors clear with brandish bursts and hit even distant targets with the Avenger, seemingly dealing 10 times the damage I can muster with an Argent Peacemaker.
Basically, my allies can deal in a few clicks what takes me 20 very tedious clicks to accomplish.
Not sure what is planned, if gunners are going to be buffed, made less tedious to use (looking at you, six shooters), or if more guns are just going to be added.
well i guess swordsmen need it more since they have the close combat factor. cause you dont really need a speciallization shield unless your bombing and shooting point blank