Need some spell selection help.. Options

[Leviathan]

Ok, my Dwarf Shamen (Dragonslayer Totem) will finally be seeing use tomorrow, but I'm still unsure about my spell selection.
I'm playing mostly combat oriented, could I please get an opinion on this selection?

Magic Fingers - Force 1
Increased Reflexes - Force 2
Improved Invisibility - Force 2
Fast (Learned Exclusive) - Force 2
Nutrition (Learned Exclusive - Force 2
Physical Barrier - Force 2
Heal (Learned Exclusive) - Force 4
BatteringRam - Force 4
StunBall - Force 6
ManaBolt - Force 6

Inc Ref Note: The way my GM is working it is: TN and Drain codes as standard, max number of successes is limited by force, every 2 successes gives you +1d6 init.

BatteringRam Note: This is a custom spell I'm negotiating with my GM about. Think Powerbolt that cannot hit living targets. If my GM and I cannot agree on an appropriate drain code, I'll use PowerBolt instead.

So, what do you all think?

[cleggster]

Hmm, I don't know how much use you are going to get out of a Force 2 barrier spell. That's not going to stop much. It will have the strength of glass. And at a target number of 6, it's unlikely to stage any higher,