Chaplain Cassius

4xTac Squad (10 )
flamer,lascannon, serg with powerfist, Razorback-tl heavy flamer

2x assault squad(10 )
2xflamer and serg with powerfist all have jump packs

2x Predator
autocannon, and 2 hvy bolters

The idea here is to break up into combat squads. One squad stands and shoots lascannon the other jumps into the razorback and rushes foward with two jump pack squads for combat support and the predators lay down fire. Also I took cassius simply for the cost and he is toughness 6.
I have not tested this army out. Would this army be able handle hordes of orcs? and landraiders with black templars in them?