Hi there

Question regarding affixing, been away from PSO2 due to irl circumstances (not at home these past 3 months)

I heard Dudu's boost incoming?
I wanna try updating my Rear unit (changing Mech's rear) to ☆１３ version if possible once I got back home for a week at the end of year (is UltimateBooster hard to find? UQ only?) ...... or maybe see what the game has to offer by then.

To make 6s unit (currently using +190 Atk, 5s) with SSA (that's the term for S6~S8, right?) ..... how much does it takes for R-Atk focus? Mainly for R-Atk, HP is secondary (PP isn't a concern, I'm cool with +0 PP) ..... Should I use ResistUp? Current MaxHP is around 990, GuHu.

I'm currently using PersonaReverie + ApprenticeSoul + GraceShoot + Shoot4 + ArksMax ....
If I tried same affixes with added S6, any estimation for cost without upslotting (excluding Grace's price)?
Can it reach 100% with upslotting?

Or any recommendations for affixes? Or something to change?
I'm not good with affixing and kinda out of loop, so, I'm not sure if there are new affixes

Also, how much is S6~S8 for R-AtkUp (Ship 2)? I wonder if I have the budget to do same affixes from my current one, with added S6 for 220 R-Atk orz

Thank you very much.