I prefer Life Link over Goddess' Blessing for pubs as its more useful for self protection as well as giving IO a method of remote healing. The cards are all centered around maximizing healing output while giving IO sustain with Restored Faith. My recommended strategy for IO is to start games with Luna on the point and trying to capture right away, although if that doesn't work because Luna dies or the other team wipes you I would say to deploy Luna off point and try to use the stun to kill a flanking enemy or pocketing an aggressive damage until your team can get a kill and have momentum to take the point. When pushing the cart if you are coming up on a choke and know multiple enemies will melt Luna as soon as she rolls up don't just leave her there to die. Move her to a new location to make use of her offensive abilities and healing with LL until your team can again get a kill or two and push past the choke. If you like staying near the cart or point while Luna is capturing you might consider ditching Broken Deity and taking a few points off of some other cards in favor of Protectors which can help you regen moonlight a little faster. If you are capable of hitting shots consistently however I would recommend pouring points into moonlight garden instead if you are always out of moonlight. For items I like Caut as IO has a high fire rate and can easily sneak a shot in or two in between healing allies. Nimble is always a good buy as well as Haven/Blast Shields depending on the enemy comp. Illuminate and Resilience are good buys but situational depending on enemy team comp and Master Riding is useful if the map is large or you die a lot. Those are the main items I recommend and maybe deft hands or morale boost if you are playing more offensively or like her ult. Heal whoever needs it most, so if someone is in a fight and at half prioritize them over someone at 1/4 that's out of harms way. That's about it. Hope this helps you.