This is a strict south-to-north list of the duel locations, this is not the required order (if there shall be one) for the Duel Rush category.

There are four on Iki. Obviously these are excluded in a "no DLC" run

The Eagle

The Viper

Khunbish

Black Hand Riku (Duel in the Pit of Darkness)

There are five in Izuhara

Warlord Harunari

Kaede (Duel at Tadayori's Rest)

Yasuhira Koga

Tengu Demon (Duel of Demons)

First duel with Ryuzo

There are twelve in Toyotama

Yasumasa (Duel in the Drowning Marsh)

Hirotsune (Duel Among the Spider Lilies)

The Spirit of Yarikawa

Altan

General Temuge

Masako

Tomotsugu (Duel of Crashing Waves)

Kiyochika (Duel Under Falling Water)

Kojiro (Duel on the Mirror of Sacred Light)

Lord Shimura

Kanetomo (Duel Under Autumn Leaves)

Second duel with Ryuzo

There are only two in Kamiagata

Khotun Khan

Bettomaru