That's a nice extensive list
05 Darkening Sap Karavan, Matis Kami, Zoraï
10 Lawless Karavan Kami, Fyros
20 Slavers Karavan Kami, Tryker
01 Ancient Dryads Kami Karavan, Matis, Sap Slaves
13 Lagoon Brothers Kami Karavan, Tryker, Cuzans
24 Woven Bridles Kami Karavan, Matis, The Arid Matis
Not all from tribe Welcomers, I admit, two of these tribes will still only let me take missions from their Scouts, but I've never seen that make a difference.