So with colection of all contributions and hypotesis, this is the estimated schedule:
.
Wednesday - 16 January 2019 - 7am (gmt) - STRENGTH ( Barbarian, Fighter)
Sunday - 20 January 2019 - 7am (gmt) - FORTITUDE (Cleric, Druid)
Wednesday - 23 January 2019 - 7am (gmt) - MYSTICISM ( Sorcerer, Wizard)
Sunday - 27 January 2019 - 7am (gmt) - SERENITY (Paladin, Ranger)
Wednesday - 30 January 2019 - 7am (gmt) - SURVIVAL ( Barbarian, Rogue)
Sunday - 3 February 2019 - 7am (gmt) - PIETY (Cleric, Monk)
Wednesday - 6 February 2019 - 7am (gmt) - DECIMATION ( Fighter, Wizard)
Sunday - 10 February 2019 - 7am (gmt) - NATURE (Druid, Ranger)
Wednesday - 13 February 2019 - 7am (gmt) - SHADOWS ( Rogue, Sorcerer)
Sunday - 17 February 2019 - 7am (gmt) - JUSTICE (Monk, Paladin)
.
and from 20 February start over …