Hmm, I can't remember what cards you have access to during that battle. I usually played a lot with fire (only useful in long rounds though, due to the armor) and used Regiment drummer to get out more units from my deck. Plus I had some movement in my deck to boost Gascon
. Also, cards that let you draw additional cards to your hand can be quite useful in Thronebreaker.
It kinda worked out for me but you can also just check out some of the newer youtube videos with the False Hope battle.