What are the best ones?

Looking on poe ninja it seems a ton of people are running hatred aura so im assuming most popular is the Redemption Sentry?

I have heard the Scinteel Synthites and the Slave Drivers are great but im not seeing almost any of their auras (wrath/zealotry) being used. Is there a reason?

I know Vaal Fallen are apparently great for bossing but shit for mapping, any advice would be spectacular.

Spectres overrated and should i just go zombies?

ty

Im playing spectres almost every league

Redemption sentries are sick as fuck atm, before that almost everyone played slave drivers, some people still do

Flame sentinels are fun if you get bored, requires some gear changing but shouldnt be too much.

Try out sentries, they are crazy good and whole screen gets sent to oblivion

Where are they found

Sentries?
Redeemer influenced maps, but you can ask another player who has them already to desecrate them for you in their hideout

Ahh yeah would be easier. Thx

What other auras do you typically run other than hatred? Skitterbots?

yep skitterbots, clarity, hatred
that's what i'm running on my life based version