You are probably going for 6 to max out the squad size in the razor... but just on the off chance that you weren't aware... 'odd numbers' are the new 'even numbers' for squads in 5th ed.
The wording on 50% has changed for granting victory points. You now get 50%
VPs if the unit is
AT half. Not just if its below half. So from a
VP standpoint, a 5man unit and a 6man unit both cough up
VP for losing 3 models.
Both 5 man and 6 man squads won't lose 25% or more until they lose 2 models. Even better, you are making a templars list. So any sized unit is taking a test at 1 casualty.
So, you can save those 10 points and run 5 at virtually no loss. If you want. If you have a use for that last body, then there isn't anything wrong with taking it. Just don't take that 6th guy out of a 4th ed. habit