Hero Range

The hero combat skills: 2,5 e 8 have range. The range indicates how many army lines ahead the skill can hit. A Hero on correct row in APC can use his combat skills efficiently and hit all enemy rows. On the other hand, in the wrong position, it can nullify the hero's skills. 2-3 range heroes are better in first row (ex.: Arsenal) 4 range heroes should be placed in midle row (ex.: Razor) 5 range heroes can be placed in last row (ex.: Shoota)

Take a look in this formations with hero Arsenal. He has combat skills with range 3.

Formation 1 (efficient)
Here Arsenal can hit all enemy rows. He have to be in the first row to be efficient. 

Formation 2 (inefficient)
In this position the same Hero can hit only the first row of enemy APC. Combat skills with range 2 would be disabled in this position.