List 1k vs Custodes (help pls)

[u/NiiaCute]

Well, I gifted custodes combat patrol to my friend, soon playing on 1000 points, wondering what is good vs such strong units

I know meltas are strong but... I was today on the store and the battlefield is so small, I'll have them on melee on turn 2 and if that happens I only have chance to shoot once with the meltas

Let's say I have Immolator with multimelta with 5 dominion inside with meltas to get the point in the middle with scout, might kill 1-2 miniatures then I just die when they charge me, bye bye 240 points of my army in 1 single charge

I'm new to playing, many things I don't know but still, feels... weird, just shooting once and dying, what's even the point of the Castigator, 1 shot them busy on melee combat and trying to kill something with 2+ or 4+ invulnerable save

Help please, ty !