So far my best method of amity increase with him is as follows (except when it requires you to fail, then don't even try at that point)

Von Maren - Valks - Becky - Gerard Mercello - Fridri Dofricson - Renaldus

when everything succeeds you should get about 220 accumulated favor level and about 120 at the end of all 3 sessions.

Please reply if you have better method.

Valks > Fridri Dofricson > Renaldus > Kirklas > Bart > Gerard Nercello

I got the most consistent results with the following:

ValksBeckyFridriKirklasRenaldusGerard

Likes: Casto Luce, Duras, Renaldus, Kirklas, Fridri Dofricson, Von Maren
Dislikes: Siena Volaire, Delphad Castillion
Can fail on : Becky, Gerard, Valks (Often),

Tested Combo: Can fail on this
-Duras 000
-Fridri Dofricson 000
-Renaldus 000
-Kirklas 000
-Becky 0x0
-Gerard Mercello 0x0

Tested Combo: 100% SUCCESS RATE
-Casto Luce 000
-Duras 000
-Renaldus 000
-Kirklas 000
-Fridri Dofricson 000
-Von Maren 000

I don't know why, but it is possible to successfully complete a conversation 1 time using "Keep Talking", but when I choose this option to riddle a second time, it always ends up with zero points even if I had the option to end the conversation with 100+ Amity before.

Valks
Siena Volaire
Duras
Fridri Dofricson
Kirklas
Renadlus

This was the latest sequence that worked for me: renaldus, kirklas, fridri dofricson, casto luce, duras, siena volaire. More or less gets me near/over 200 accumulated favour, and minimum favour 40+

To Fail

Fail