When shooting from Vantage terrain at a target with Engage Order, gain Accurate 1 if target is 2"+ lower, or Accurate 2 if 4"+ lower. This lets you retain attack dice as successes without rolling.
From Vantage terrain, operatives 2"+ lower with Conceal Order cannot use Light terrain for Cover (becoming Valid Targets). However, the defender gets an improved cover save: retain as critical success OR retain +1 additional save.
For Obscured checks, ignore Heavy terrain connected to the Vantage terrain the attacker or target is on. Here the pillar is part of the attacker's structure, so Target 1 is not Obscured. Target 2 is still Obscured by the separate terrain.
Complete comparison: Engage Order targets are Valid Target with accuracy bonus. Conceal Order targets In Cover from Light terrain become valid targets (with improved saves). Conceal targets In Cover from Heavy terrain remain protected (since Vantage only negates Light terrain for Cover).