I also have chased Terra USB many times and always missed it. I was gonna do a pull or two on this banner, but after going crazy on banner 1 I'm forced to skip in order to save for future plans.
As for tonight's superbosses, Sapphire and Ruby weapons felt easier than the first two, but I'm sure it's based on everyone's available relics. Here's videos of my two D350 kills:
Sapphire Weapon:
Youtube Link
Ruby Weapon:
Youtube Link
For Sapphire Weapon, I used:
Onion -- Wrath, Wrath -- mUSB
Elarra -- Curada, Allegro -- USB
Yuna -- UltraCure, Shellga -- USB1
Rinoa -- Meltdown, ChainStonega -- SSB, OSB
Maria -- Chain Blizzaga -- BSB
Magicite: Ixion (M) -- Midgardsormr, Firemane, Evrae, Evrae
This was the harder of tonight's two bosses. Onion did nothing but wrath into his mUSB over and over for the quickcast on my dps. Elarra and Yuna healed, alternating medicas as needed. Yuna's USB medica applies party haste, so she timed hers to always land right after the dispel. Rinoa did her en-earth SSB then used a few OSB's in between earth spells. Maria used her old, but still extremely powerful BSB.
For Ruby Weapon, my team was:
Shelke -- Entrust, QuickHit -- no SB
Fujiin -- PowerBreakdown, MagicBreakdown -- BSB
Elarra -- Curada, Allegro -- BSB
Raines -- DireHeal, Wrath -- BSB
Alphinaud -- Meltdown, UltraCure -- BSB
Magicite: Unicorn (M) -- Tiamat, Phantom, Gizamaluke, Evrae
RW: Haste + ATK/MAG buff
This boss is entirely piercing or gravity, so don't bother with wall or shell/prot. You need to have only 4 members alive before his tentacles come up, so I brought in Shelke (dived) to instantly entrust a soulgauge to Elarra, then instantly call the haste RW, then she killed herself with QuickHit. My kill started off super messy because of an unlucky confuse proc early, then I screwed up the targetting to cure it, but once I stabilized from that it was pretty easy from there. Fujiin's BSB helps break the bosses mag/res for my mage team, while Raines and Alphinaud just dps with their BSB. I used Elarra's BSB for this fight instead of her USB because it gives last stand and for the medica command. Because everyone on the team was using only BSB commands, all of the skill drains did nothing.