I used crit cards a lot before finding Monkey.
I think my team was x1 Excalibur (maxed), x1 Excalibur (not max), x1 Accordian and whatever stop 3 cards I had.
When you get a +50% on attack UR I recommend spending everything you have to make sure you HUR them if it's an event. After that Skill Nullification URs have been the most useful, followed by +atk all and stop cards once again.
I can win most FAWs with just Monkey/Summer Oracle alongside cards I want to level. I've spoke to my guild a little but never really engaged much with them. I'm 20, which isn't that old but I always feel most anime fans on the internet are about 15 which makes me tend to avoid communication (not that I communicate anyway).
Excalibur/King Arthur remind me of Saber, my name and town names are Saber references too. I used to get slightly tempted to spend real money but it just shortens the experience and you'll get there eventually.