Im returning to 40k after many years, and I would like to know how people are outfitting their Adeptus Custodes squads. I am adding them to a guard army, so in my case I like the idea of using them as a counter charge unit, with the custodes vexilla, two spears and three shield/sword combos to keep them alive.

Is it a waste to plant them in my gun line for the fearless rule? Is it a bad idea to put a shield on the banner bearer when it comes down to wound distribution?

Im interested in ideas about how to use them best.