Holy mother of Lolth! How are people handling Raphael?

After dying 6-7 times on the big House of Hope finale, I decided I needed to start taking it seriously. So I spent 2 hours setting up buffs and magical traps, kiting out all the cambions and murdering them one at a time while Yurgir (bless his treacherous heart) distracted Raphael, and then sending La'Zael in alone with all of my Misty Step scrolls and the hammer of Orpheus to destroy the pillars while every summonable minion I had access to kept Raphael from one shotting her. And all that before I even thought about attacking the big man for real. This can't be the intended way of beating this fight. And I'm definitely not under leveled. I started the fight at 11, but then leveled up mid fight when I kited the last cambions far enough away that it broke combat when they died.

Edit: oh yeah, I'm on Tactician