As per Fiel's request, here's a (partial) correction to the number of SP in fourth mastery.
At level 43 I have obtained four additional SP from quests:
1 from a quest at level 40 (I believe from Dragon Master 4th Job Advancement quest)
1 from the quest Knowledge about Dragons 3
2 from the quest Never Give Up!
There may be more quests to come, indicating that there are more skill points for this job advancement than was previously assumed. It's too soon to say, but it may be possible to max both skills in the 4th advancement after all.
EDIT: Gained an additional 3 sp from quests at level 46. Total exp from quests now comes to 7, so all skills from level 40-50 can be maxed.
At level 43 I have obtained four additional SP from quests:
1 from a quest at level 40 (I believe from Dragon Master 4th Job Advancement quest)
1 from the quest Knowledge about Dragons 3
2 from the quest Never Give Up!
There may be more quests to come, indicating that there are more skill points for this job advancement than was previously assumed. It's too soon to say, but it may be possible to max both skills in the 4th advancement after all.
EDIT: Gained an additional 3 sp from quests at level 46. Total exp from quests now comes to 7, so all skills from level 40-50 can be maxed.