An unblockable crit is strong, especially against Soontir Fel or Fenn Rau. But the pilot skill 8 Ten is just a little too expensive for what he does. If you wish to make the build reliable, a Mangler Cannon is a must to ensure consistent results. Though at that point, the price tag starts ramping up fast.
Veteran Instincts takes him to pilot skill 10 and a Fire Control System ensures accurate dice results. B-wing/E2 with Nien Numb is a great way to unlock the green 4-straight manoeuvre and ensure Ten can be where he needs to be to apply damage.