Lucius and Canas join at effectively the same time as there's no way Lucius will be doing anything in Ch 17. First Ring is at the start of 19, 2 chaps later, so let's put them both at L11.
Canas's biggest problem has always been his Spd, however, it's also been noted that an early promotion fixes this. But then other units want the same, right? Indeed. There is an opportunity cost associated with early promo for Canas. Fortunately, it's none too difficult to determine what that cost is. Lucius gets +3 Hp/+3 Def in promo gains, while Canas gets +4 Hp/+2 Def/+8 Avo. Both gain some extra durability, with Canas gaining more if anything, and both gain staves, however only Canas gains that big boost in offense, so the opportunity cost shaves away the extra durability/staves, leaving the AS boost as the net benefit.
"but C staves"
The main benefit of that is using Physic sooner, but that depends on how many of those damn expensive Physics you can afford to buy in the secret shop. If you can buy a lot of them, then this may be a good point. If you can only buy a handful, which seems more likely to me, then you'll have units using them anyways (Pent/Serra/Priscilla) with little to no surplus left over.
With that in mind, let's just give Canas that net benefit of +4 AS from early promotion, and see how he stacks up.
Lucius 11/0: 15.8 Atk, 13.2 Spd----22.4 Hp, 1.8 Def, 30 Avo
Canas 11/0: 18.4 Atk, 12 Spd----23.1 Hp, 5.8 Def, 31.8 Avo
Canas's biggest problem has always been his Spd, however, it's also been noted that an early promotion fixes this. But then other units want the same, right? Indeed. There is an opportunity cost associated with early promo for Canas. Fortunately, it's none too difficult to determine what that cost is. Lucius gets +3 Hp/+3 Def in promo gains, while Canas gets +4 Hp/+2 Def/+8 Avo. Both gain some extra durability, with Canas gaining more if anything, and both gain staves, however only Canas gains that big boost in offense, so the opportunity cost shaves away the extra durability/staves, leaving the AS boost as the net benefit.
"but C staves"
The main benefit of that is using Physic sooner, but that depends on how many of those damn expensive Physics you can afford to buy in the secret shop. If you can buy a lot of them, then this may be a good point. If you can only buy a handful, which seems more likely to me, then you'll have units using them anyways (Pent/Serra/Priscilla) with little to no surplus left over.
With that in mind, let's just give Canas that net benefit of +4 AS from early promotion, and see how he stacks up.
Lucius 11/0: 15.8 Atk, 13.2 Spd----22.4 Hp, 1.8 Def, 30 Avo
Canas 11/0: 18.4 Atk, 12 Spd----23.1 Hp, 5.8 Def, 31.8 Avo