>>20071180Domon can at the very least fire off a God Slash at a moment's notice and without any apparent effort or wind-up. No super mode or concentration needed. I don't know that there's any scene implying he can fire them off continuously, but he can fire one or two off without much issue. Domon also extends the length of the beam saber to several times it's normal length a few times during the show, and fires off the Shining Finger and Erupting God Finger as a burst of energy a few times during the show, so they're presumably at least short to medium range weapons he could use if the situation called for it.
>>20071187Allenby uses the head vulcans on the Shining Gundam to destroy some Death Army units in Tokyo, so the machine cannons on the Shining and God are presumably capable of it.
>>20071190I doubt they were glancing blows given the framing, since the Double X is portrayed as helpless while the beam sabers whale on it unopposed. One or two might be glancing, but there are a dozen+ hits there that are shown scoring straight across the unit so it's highly unlikely they were all just glancing off it. The more likely scenario is either that the backpack's construction isn't as strong as
>>20071194 said or a couple of repeated hits in a row to the same rough area is enough to actually penetrate.