You can max your gauge out on RB in 20s but its not enough time to set off Full Connect, so while ya it's doable it's not practical in this test
This is literally only good for gear, this combo spam doesn't even beat the combo I did for testing, it's fucking bad my dude, especially with the amount of PP you waste
Prism -> 3x Flare is the highest dmg output on stationary or almost stationary bosses. Glitter -> WA teleport is good for PP conservation but it's not something you're always going to do especially if you know you can't hit the weakpoint which then you're better off relying on Prism instead . Glitter -> WA -> Flare 3x is going to output more granted you know you're going to be able to hit the wp.
like Azakuya already said, its not very hard to do 8s on weapons especially when you're allowed to have 1-3 (or 4) SSA's on the weapon that are always at 100% transfer rate and having cheap 8s SAFs you can buy in the player shops make it all the much easier. If you looked at my gear build I posted you'd see that really the only thing expensive was the Mana Rev (which is way cheaper now because of Omega Luther UH) and the Grand boost but outside those 2 you can opt for some other cheaper fodder. If you need cubes, either do solo PD or run DQ, rains cubes like crazy
usually you lean toward the Ex version of these souls but I guess if you care about the extra 5 atk and 1pp I suppose its okay to use them but Astral Soul fodder isn't too over priced that you might as well stick to buying Ray/Unions still