Hi there are 2 diferents advanced combo in valheim as far as i know.

The ones that are just using regular clic on mouse that are called powered combo.

And the ones called emote combos. Witch require to bind hotkeys.

Are they both allowed in the hardcore speedrun?

The second one (emote combo) is like tchat command in game for me. As you need to bind hotkey in tchat to use it.

So please can you clarify this for us. Thx a lot