Yes, smite spread damage too.
It seems paladin3 is mandatory if you’d like to smash like a god.
The girl in the video is cler2 diev1 paladin3 monk1 - inquisitor. This is aura support based build, however no CC immunity or ress. She likes to utilize double punch + conviction debuff + wheel too. Monk double punch = filler, real combo = breaking wheel, conviction, smash spam. Wheel will last longer once inqui rank2&3 are released.
Diev carve attack will splash on wheel too (3 overheat), and will grant free wood drops. It is the only [pierce] attack you will get on the cleric tree.
High dex (crit/evasion) builds are recommended to take priest1 since monstrance buff = +30% dex, and +10 flat dex. Critting a high base damage skill such as God Smash is nice.
Cler2 Priest1 Pala3 - X - Inqui?
If you’d really like to drop cler2, you won’t have safety zone attribute and heal10, and divine might. Another option is krivis1 for daino.
Kabba rank7 for revenged sevenfold (good at PvP too), and ein sof SP heal.
Plague doc vs CC.