The obvious answer would probably be to make them both creature spells, but I think card 1 presents an excellent opportunity to create a card that gives Intercept to a creature. This would obviously be pretty powerful, so it needs to be somewhat costly. With the introduction of Elementalist we will see an increase in attack spells thrown around, so I think it would be a good addition.
My pitch:
"Bulwark of Steel", level 2 war enchantment, 2/7 mana
target: Living, non-mage, non-pest creature
This card can only be revealed when you have Priority. While guarding, this creature gains Armor+2 and Intercept.
V2 (Credit Juli):
"Bulwark of Faith", level 2 holy enchantment, 2/7 mana
target: Living, non-mage, non-pest creature
This card can only be revealed when you have Priority. While guarding, this creature gains Aegis 1 and Intercept.
Upon further review, the Guardian Angel is just better than using the above enchantment in almost every case. I suggest the incantation below instead.
Incantation:
6 or 7 mana
This creature gains Aegis 2 and Intercept until the end of the round.