How to beat the bosses on Hard / Very Hard Combat (esp Moder, Yagluth, Queen)

I am wondering what strategies people have used to beat the bosses on Hard or Very Hard combat mode. Please share your tips here! Including any and all cheese strats, short of outright cheating.

I have been trying for zero deaths on Hard mode. Got to Moder for the first time, and got annihilated. Even with full Silver armor (82), her icicle shots hit for over 90 damage! Accidentally got hit twice when she swooped close, GG.

My tips so far:

Eikthyr… uh, just use dodge. Elder: fire arrows, hide behind stone columns from his projectile shots.

Bonemass: My new cheese strat is to just build a workbench, and crawl on top of the giant skull (w/ poison pots, obviously). Upgraded Stagbreaker or Iron Sledge him to death. He can't hit you up there.

Moder??

Yagluth??

Queen: Haven't got there, but probably cheesing her by hiding inside the entranceway most of the time.