Miyamoto Musashi or Uesugi Kenshin

[Descender]

Between these 2 partners which do you prefer?

[Riddras]

For me Musashi, but then again I haven't used Kenshin much.

[LtSnowy]

Use Uesugi Kenshin. Miyamoto, albeit a good partner, is weak unless you have her at max scroll count, and max level.
Kenshin is capable of Dew Creek - Hell, on one scroll.