Open Legend was specifically trying to get away from this sort of resource tracking, even to the point of getting rid of amounts of currency and even ignoring ammo counts most of the time. You can add something like this as a house rule when you’ve had a while to get used to the system as it is, if you even still want it then. It’s very freeing to have your character able to do their cool stuff all the time rather than being limited by an arbitrary number that doesn’t really make sense (since when do Harry Potter or Gandalf run out of spell slots?).
What you’re missing is context for how combat flows in OL. Defend Interrupts aren’t meant to be used against every attack (unless you’ve built your character around that concept), they’re a desperate, dramatic attempt to save yourself from a big hit. It costs your next action because it’s powerful, and you don’t have to decide you’re doing it in advance.
As for other defensive abilities, the only ones that I can think of are boons. While boons usually cost a major action to invoke, you can sustain them for a minor action, meaning that you can keep one of them going (on as many targets as you can manage in one invocation) for as long as you want unless you get Stunned, knocked out or have to take a Focus Action.
I don’t see the need to be honest, though there is a wiki coming soon that could help with this if you want. PCs in this system have powers and abilities as varied and unique as the imagination of the players. I’ve seen characters whose Entropy was energy draining tech, poison, necromancy or a pact with a devil. I’ve see Influence be illusion magic, holograms, or forcing the target to experience a very real and terrifying parallel dimension. Any list of spells or powers is only going to cover a small percentage of the possibilities no matter how extensive you make it.
I do have a suggestion for how to make your character work though: stop focusing on the powers and start focusing on the abilities. Don’t try and model specific rulebook spells, instead think about what the character’s capabilities are. If they have protective magic, give the a Protection score and try out the boons there. If they have the ability to enhance their sword for their attacks, see what attributes give you Bolster and look at feats like Martial Focus and Attack Specialisation.
Start from the character and the OL rules will fit like a glove, but if you start by trying to fit a different system’s rules inside of OL then OL will struggle make it difficult for you. Try modeling your sword mage as a living, breathing character rather than a collection of spells, then you’ll start to see what makes Open Legend great