Construct buffs.

-Juggernaut's force wall duration increased to 20 seconds (it was 5 before which was completely useless)
-Artificers gain a new spell Lesser Magic Missile - which functions as normal MM but with a significantly longer cool down (purpose of it is to give builders a chance to get away, or provide supportive fire in a construct spearhead)

-Juggernauts now have ablative shells, which means that energy projectiles will be deflected as with ablative vests, as with vests slug throwers aren't affected