To deal 260+ DPS with the remaining cards...
It's pretty simple.
Don't forget that there's still a BUFF card in Ree Shil's deck.
First, with [Sword Dance Girl]'s[Dancing Sword], the DPS of the surrounding cards will be different.
[Wind Fox]'s[Vine Burst] deals 45x2x2x2=360 points of damage.
[Kung Fu Sheep Rabbit]'s[Double Move] deals 200 points of damage.
With various BUFFs:
[Demon-eliminating Human] deals 50 points,[Nameless Sword Spirit] deals 30 points.
[Ghost Wind Priest] deals 40 points.
This combo deals a total of 680 points of damage.
However, on the second round, you can add another 40 points of damage from[Sword Dance Girl].
By ensuring that the first row cards are[Stillness]or[Defense], he wins by... 20 points!
Yes, Ree Shil has calculated all of this.
Anyway, the Boss won't heal, so just grind it down.
2W/20=1000 rounds.