I've been playing around a bit with transferring Jelanda at chapter 5 for Ending B, and I'd just like to share the optical route I've come across.
After getting her to level 3, first thing I do is max her traits at a descending order from the top. I'm sure you can optimize this better and get her a better score, but I haven't seen a difference when pleasing Odin.

I then buy her certain equipment. This set so far been most promising for me:

This is not much different than commonly used, but I found out you don't need to give her a cloak.
You only need to buy the Rod, Tiara, Fairy Ring and 3x Pearl of Karula, (Angel Curio is needed for Surt so i'm not counting it).
Transferring her with this will give you your Guard Reinforce and 3x Ether Scepters at Ragnarok.
After getting her to level 3, first thing I do is max her traits at a descending order from the top. I'm sure you can optimize this better and get her a better score, but I haven't seen a difference when pleasing Odin.

I then buy her certain equipment. This set so far been most promising for me:

This is not much different than commonly used, but I found out you don't need to give her a cloak.
You only need to buy the Rod, Tiara, Fairy Ring and 3x Pearl of Karula, (Angel Curio is needed for Surt so i'm not counting it).
Transferring her with this will give you your Guard Reinforce and 3x Ether Scepters at Ragnarok.