So some of the cheeses are gone but there are still easier ways of doing things...
lights:
1- go to the same cheese rock everyone got blown up on to the ne t level. Just double jump up there but works better if you have triple jump. ( I still haven't made it up this way but I suck at jumping)
2- jump on top of the lights from light to light. You can also jump on the rocks surrounding the lights and not get weighted with darkness. Helps if you are a titan or warlock. Titans use striker and pulse grenade. Warlocks use your nova grenade. When you get to each new light throw the grenade at the base of the light so you can sit inside the grenade without being touched by thralls. ( helps to run double grenades)
On both you do the same as the old cheese at the end. Activate last light, jump on top of it. Wait until it's about to explode jump on trigger, jump on rock next to light. Wait for ogre, kill ogre. Wait for bridge cross bridge and enter the light
BRIDGE CROSSING:
the he disappearing enemies still works so start the fight that way. You need at least 5 people for this to work unless you have someone that knows how to solo the bridge and jump it.
you only need one person to cross but they need to go straight up the middle like the were going to the next hallway room and stay alive. Once they are across everyone else get on top of a pillar and get a good vantage point to kill ogres and witches if they are messing with the person who crossed. Kill ogres and you are done.
hallway and witches are the same except you get loot after killing witches and her minions.
CROTA:
should fight him from the left, if you have a lv32 hunter have him use invis with the sword. (Make sure he has chalice before he goes out there and that people are not only looking for boomers but the nights that jump out to protect Crota) It is easier for him to get double attacks with each sword. But either way the person with sword should get double attacks with the sword every time. This is easily accomplished because... The first time you bring him down you should bring him down with primary ammo. Everyone but the boomer sniper shoot start shooting him as soon as he picks up the sword. After Crota stands up he is immune for a few seconds so after 2 seconds hit him with heavy ammo. Preferably at least one level 32 with a maxed out Gally.
After every 2 swords you will get ogres so everyone should just immediately go to bottom middle room all the way in the back. Just be careful on the way out because Crota most likely will be on the sides. Also the top rooms where you have been fighting him will be full of thralls so clear those out before you start on Crota again.
hope this helps. Please add because I'm sure I've missed a few things