Jacen Solo was comfortable taking on anybody in the galaxy but Luke with one hand; he established firm dominance over Jaina this way in their final fight and had previously bested Katarn and three other Jedi at the same time. Meanwhile, Luke's a better combatant one on one than Jacen and far more powerful.
Eminence, Katarn had the newly promoted Jedi Knights and there were civilians around. If they were not there, then the fight might have been different. Katarn had to worry ahout them. Collatoral damage.
__________________ "Great men are forged in fire. It is the privilege of lesser men to light the flame . . . whatever the cost"
To be fair the only wanted to place a tracker on him, not kill him.
I say this trio is too powerful and familiar with Luke for him to take the win. Id give team 8/10. He would make them work very hard.
__________________ "You must begin by gaining power over yourself; then another; then a group, an order, a world, a species, a group of species... finally, the galaxy itself."
- Darth Plagueis
"She may be small but she packs a punch and when shes in this mood...she goes for my danglers" - Oghren, Dragon Age