Casting this under a monster sometimes launches them high up into the air, but apparently only if it kills them on the first hit, which isn't helpful.
Firing frequency increases by 0.1 seconds for every 50 levels of Skeletal Fortification.
If enemy is static (not moving) placing Skeletal Fortification directly underneath certain enemies, like Dragons and Guardians, will enable SF to strike enemy twice. Works best when using Shadow Veil and no summons are present.
With Focus cooldown modification, 2 towers may be active at one time. With higher CA levels 3 or 4 towers may be active as the cooldown is reduced by 1 second per 30 levels(.1s/3 CA). This allows an Astral Lord player to easily compensate for moving enemies as well as punish larger less mobile monsters such as bosses.
Pros and Cons
Allows you to target enemies normally not accessible from your present location (i.e. across a river, over/under a bridge)
It is a 'line of sight' Combat Art and will only strike enemies if it has a clear, unobstructed path to it. (hills, rocks, trees, statues and other objects will block projectiles)
With Scatter Shot mod, only one arrow will be fired if only one enemy is within range.
No modifications, no skills, naked, all stats between 25 and 35 (i.e. a nearly-new character).