invuln save question

[GustiGold]

Hi, i'm new to the game, i play a couple games and i wanna try Adeptus custodes and i have a question
when i saw Custodian Guard Squad saw i can have a unit whit melee and ranged custodes, my melee have 3+ invuln save and ranged have 5+
when i want to use the invuln save i choose which mini they attack? or i can use the melee invuln save and if they die i remove a ranged mini

 

[MAXXxxx]

you can choose who is affected, but must remove that type.
So if you want to use the 3++ and fail the save, then you remove a melee type.

btw, the codex is not near me, but is that 3++ in general or 3++ against melee attacks only? It can happen, that you can take the better save only in melee and against ranged you are stuck with the 5++ one.

 

[GustiGold]

(i speak on spanish so i don't have the names of the wapons on english, so i will put those on spanish and the rest on english)
the unit uses "lanza Guardian" and says "any mini can change the lanza guardian for Espada Centinela and Storm Shield

 

[MAXXxxx]

finally home, so I could take a look.

it simply says it gives a 3+ invulnerable save, so it works against shooting too.