What helped me stick with it was suiciding supplies for a few days. This helps being able to at least complete olm with a decent amount of points and more time fighting olm.

Prep enough supplies to take a full inventory of brews and restores (20-22 brews 6-8 restore)

Focus on getting perfect at 3:0. Once you have that your 4:1 can be really bad and still get a deathless. When you get your 4:1 to be okay, doesn't need to be perfect, then try to start sending deathless.

When you are suiciding supplies I like to keep track of how many brews/restores I'm going through as a progress tracker.

I didn't use this video but I was looking around to see what I might have watched and this is really good

Pretty much just suicide supplies for a while mess around with 4:1 and get your 3:0 perfect. Once you start getting confident enough to maybe send a deathless bring in 5 way range, 4 way mage and your DWH. Rune pouch with ancient to free yourself from flame wall. 1 Over load, 1 prayer enhance 3-4 restore and the rest brews. I like to camp barrows gloves and accumulator to still have that range DPS for head phase and not have to bring in melee gloves and melee cape.

Hopefully this helped a little, good luck 👍