|For those of us who are not graced with twenty extra Hector's in our barracks to burn for Distant Counter, I offer a well rounded use of Linus. He'll act very similarly to Raven, but can be utilized in any mode without requiring Life and Death 3 as a skill and as the Basilikos refinement.
Basilikos is given to him naturally at 5-stars so it's an easy choice. It also reduces skill Cooldown, guaranteeing a special proc during any battle if you use anything under 3CD.
Luna is reduced to a 2CD thanks to Basilikos, comes naturally, and is powerful, so yeah... Use it. If you'd rather increase your survivability, just swap Luna with Sol to get some life back after each fight.
Brazen Atk/Spd 3 is another skill Linus already comes with, and frequently can change the tide of a fight. On top of adding plenty of Atk it increases his chances of doubling, a true win-win. This synergizes well with his next skill.
Desperation 3 plays an excellent role in combination with his specials and his A-skill. His Def isn't amazing, so after one hit will most likely be in both Brazen Atk/Spd 3 and Desperation 3 range. And thanks to Basilikos after one attack and one retaliation during the enemy phase, Luna will be ready to go, with an extra hit for good measure right afterwards during player phase. If you'd rather hit first, simply use Vantage 3 and you'll retaliate with a
Luna during the enemy phase.
Spd Smoke 3 will ensure anyone else who comes at you after the first round will be significantly slower, padding your chances to double. Use Atk Smoke 3 if you'd rather pad your defense.
Quick Riposte 3 Helps guarantee you get doubles, and doubles with this character means Luna activations. Quickened Pulse also pads this activation chance if you haven't invested in the other seal.
Overall Linus will be an excellent choice to fulfill that often-missing green slot in your team. This is all contingent on Linus becoming a boss in GHB, of course, so let's all cross our fingers.
(Update) Already tested in Arena and Squad Assault... Linus is a player phase monster. One hit brings him into Desperation 3 range, and bumps his Atk/Spd to 60/40 thanks to Brazen Atk/Spd 3. One hit and Luna activates, guaranteeing whomever he cut in half the first hit doesn't stand back up. And with his respectable 32 Def he'll survive the next enemy phase as long as you keep him away from magic.