Speaking of stupid mistakes, do not attempt to sacrifice a live man-eater plant. I stunned it RIGHT next to the altar and thought I could plop it on quick. That sucker woke up immediately when I picked it up.
You have to be fast. Super fast. Best if you can knock them out while on the altar or right onto it. If you're not confident, don't even try. lol
They're only worth 2 points in Kali's favor so it's not really worth it unless they're the only thing you can find. All the cavemen and tikimen are worth the same amount. Vampires are also worth only 2 points. As is the Devil, which is weird since he's a pain in the ass to take on anyway.
Yeti however are worth 4, and can be knocked out twice before death, but if they wake up, you're pretty much boned so you need to learn the timing of their stunning and have a jetpack. (Lucky day if there happen to be a bunch next to the altar)
Scorpions are worth 4 points too, but Scorpion Flies are worth 6 (Probably since they only exist in the last area before Olmec and thus are a last chance) but both only have one knock out cycle before they die and don't leave a corpse. Hawkmen and the shopkeeper are also worth 6 alive. The shopkeeper is as huge a risk as the Yeti is as if he wakes up, you're dead. You'd have to get extremely lucky to knock him out in the first place without killing him, and pick him up within those few seconds and get him onto the altar without him waking up and then wait the few milliseconds before Kali accepts it.
Now Crocmen are a challenge. They can't be knocked out easily. Since if they get hurt, they teleport wildly. And if you do stun them, they will wake up almost immediately. So literally the only way to get any points is to somehow stun them on the altar, which is near impossible. But they're worth 8 points if you can. Though by this point you've probably already gotten up to Kapala status and are probably close to Invigoration so it's best to look elsewhere and not fuck around with a crocodile.
Also worth 8 points and hard to knock out and sacrifice alive is the Black Knight. But he carries his heavy crushing shield so unless you can wrest it from his hands and get him knocked out close enough to the throne, it's best to just sacrifice him dead.
And then there's damsels, helping hands and other players who are also all worth 8 points.
Rewards:
8 points: A random item from a list of certain items
Climbing Gloves or Pitcher's Mitt or Spring Shoes or Spike Shoes or Cape or Spectacles or Bomb Paste or Compass
If you have a cape, you won't get another one
If you have all of these items, you get a jetpack
If you also have a jetpack, you get a box of bombs
16 points: Kapala which will let you drink blood and gain health for every 8 blood drops
32 points: 8 hearts added to your health
Basically, get lucky enough to have two levels in the mines with altars and damsels and you can have a Kapala really early. Couple it with an early jetpack, hopefully from a random crate, and you're set to take on the underworld. Just find yourself a shotgun.
If you destroy an altar, it takes 16 points off your score
If your score goes below 0, the first time spiders will be summoned
If you destroy a second, you have to go through the game with a ball and chain
After a 3rd destroyed altar, you get a ghost immediately upon entering levels (Including Olmec's lair. Not sure if it will also show up in Yama's room. Don't think so since it would mean you would get $220,000 for Yama's treasure instead of $140,800.)