Is this a spoiler?
Don't know. Don't read. Lol
But you can get the ogres to fight for you more than once, takes money and or a good roll.
Just keep in mind if the Ogre leader dies you won't be able to use the horn again. Not sure if intended or bug.
Interesting I never even realized the horn could be used multiple times, because I kept saving it up for a good moment, which never came.
I think "Hoarding important Buffs or powerful one-time use Items in Video games" needs to be included in the Diagnostic and Statistical Manual of Mental Disorders(DSM5) - it's so common yet debilitating. I speak as an occasional sufferer.
Objectively, the Githyanki fight is the MOST difficult fight in the game as of now. You can, of course, talk your way out of it, but most people don't want to because the Kithrak is so arrogant and rude.
Since saves will not xfer to full game you might as well just go nuts with buffs. Haste Spores/potions, Wyvern poison, Ogres, Potions of Hill Giant Strength (which you should be using anyway, since they last until long rest now) and so forth.
