With the twilight Lich I discovered by accident when fighting it was throwing a single healing splash potion will destroy one of the shields so you don’t have knock back the projectiles to break shields I die soon after and tested if it in a creative world to see if I was just seeing things and turns out throwing splash potions of Healing will get rid of the shield way faster
Those hollow caves are the best This mod is in the Better MC modpack and I had a fortune 3 diamond pickaxe and mined for 2 hours in that cave and got a full double chest of iron ingots from it (3000+ iron) and 34 diamonds (there's not a lot of diamonds in it but there's a lot of iron and other ores