Energy absorption wouldn't do anything here. I'm doubtful that Horn's capabilities as a duelist are on Obi-Wan's tier, and his Force illusions won't make up for that. Perhaps he can give a good fight, but I think that's the best I can grant him when comparing him to a guy who went toe to toe with Vader.
And Horn was one of the best Jedi during the New Jedi Order, home to some incredible badasses in it's own right, which had broken out of some of the problems with rigidness the Republic Jedi had. The Golden Age was strong but flawed, and the NJO cast it's net wider for teachings in response.
Probably pushing Skywalker in a duel, and affecting him with an illusion (in I, Jedi, i.e. after Dark Empire).
He's got some very good energy absorption too. When some laser-mines detonated, he absorbed power from them, deflected the blasts upwards, and then made a giant illusion with the excess power.
Horn's grandfather was the first Jedi we know to pull the 'grab a saber' trick. Horn himself, I don't think has ever had the opportunity, but absorbing the laser-mines is pretty comparable I'd say.
He defeated the Vong Warlord Shedao Shai, who's both one of their best warriors and can't be detected in the force.
He also beats Kam Solusar, one of the other NJO council members and a former member of Clone Palpatine's 'dark side elite,' who killed multiple other members of said Dark Side elite including their blademaster.
And there is the 'in a physical duel he can press Luke pretty hard, and Luke's better than all of those' (Post-DE Luke, btw).
thank u that time with ganner is the scene I was thinking of. It would have bugged the crap out of me for days if I couldn't figure it out so thanks again.
Glad to be of help So yea, Corran can absorb lightsaber (even, if need be, his own to fuel powers!), though it's not his favorite thing to do.
One other thing: Corran has a tricky duel-phase lightsaber that can adjust lengths, often taking foes off-guard. Additionally he often uses tricks like flickering the blade off to make a foe misjudge and overextend.