Do you still have your First Edition Charizard in a binder somewhere
Thanks to your commander(s), you should almost always have access to one legendary creature, so youll almost always be paying 1 or 2 mana instead of the full 3, but since the Channel effect is an ability and not a spell, it also ducks most countermagic, as well as pesky effects like Dragonlord Dromoka that keep you from casting spells
Those were simple calls to make, and discussing them here wont add anything to my analysis
Shes a solid 5/5 with lifelink, flying, and first strike, so shell keep you healthy on her own
Youll normally want no more than a single Benched Octilleryits Hug attack is rarely worth using, and Abyssal Hand is tricky to use more than once per turn
If the target artifact or enchantment is an illegal target as Invoke the Divine tries to resolve, it won't resolve and none of its effects will happen