Is Focus + TL really worth it?

By Chris R, in X-Wing

Also A Soontir, with an evade and a focus or two is often a detergent for the enemy to even shot at him and choose an easier target.

If you're shooting a wall with 0 agility, maybe double stacking isn't worth it. If you're shooting something with a decent amount of defense dice, the difference between 2 hits and 3 hits is more than 1.