My advice is skip the bloody Supreme Thing and Arms Guild. Build the Shaman's Residence and work on Economic Knowledge Upgrades (Only during Clan Battles) Once you researched all knowledges for the LVL1 Shaman's Residence then upgrade the House of Jarls to LVL2, Upgrade your Shaman's Residence and work on your remaining knowledges.
It helps your Clan Battles. Talking from my experience 😄
20 Victories and 1 defeat