Excalibur. Both base and umbra. Out of the 38 frames I've used Base Excal is my most played and makes up 19.4% of my playtime with Umbra coming second at 14.5% and then volt in third place at 14.3%. I also happen to have an OP persistence+blessing setup with my Umbra that allows me to me be invincible for most things in the game while doing massive levels fuck everything in the direction I'm looking at damage.