The x1 against a naked 3 agility roll will do .35 damage. Then the following turn, lets assume it is in range 1 of the X wing, with a F+TL - it will likely do 1.95 damage for a total of 2.3 damage. If you used the TL on the first turn, you'd do .61 damage. On the second turn, again, assume range 1, you take a F or TL (ignoring the effects of crits atm) and you'd do 1.47 damage. The total expected damage is 2.08. In this case, you are better off holding onto the TL the first turn.

However, if you were only at R2 on the second turn, the expected damage is .35 + 1.14 = 1.49 (saving the TL) vs. .61 + .85 = 1.46 (using the TL). As you can see, the outcome is practically the same. If the range is not changing (say you are chasing a ship) you will do more damage using the TL and then the F on the second turn.

Your numbers are off slightly for the range 1 attacks, but not enough to really change the conclusion.

3 dice + F + TL vs 3 agility (no focus) = **2.0642** average damage

3 dice + F vs 3 agility (no focus) = **1.5315** average damage

For reference again range 2 numbers are:

2 dice + TL +F vs 2 agility (no focus) = 1.1444 average damage

2 dice + TL vs 2 agility (no focus) = 0.8496 average damage

2 dice vs 2 agility (no focus) = 0.5078 average damage

For reference again range 3:

2 dice + TL vs 3 agility (no focus) = 0.6134 average damage

2 dice vs 3 agility (no focus) = 0.3504 average damage

Corrected numbers:

Saving TL at range 3, spending F+TL at range 1: 0.354 + 2.064 = 2.418

vs

Spending TL/focus at range 3 and F at range 1: 0.6134 + 1.531 = 2.145

Or only getting into range 2:

Saving TL at range 3, spending F+TL at range 2: 0.354 + 1.144 = 1.498

vs

Spending TL/focus at range 3 and F at range 2: 0.6134 + 0.8496 = 1.463

Of course, if you are also getting shot at, then focus on turn 1 probably wins outright because you can use it for defense. That math becomes more complicated.