Sniper Scorn with the crosshairs are on the first and second level as well. The crosshairs will stop moving after about 5 seconds and youth red. Soon after, the impact occurs around the red crosshair.

Anyone know exactly what the Protection Shield does? I've seen the melee scorn summon them but I haven't noticed an obvious effect.

Levels 1 and 2 are easily soloable if you are an Engineer. Use your stuns wisely! I haven't attempted with Com or Op yet.