“Ending” in DLC/Advanced Level 20 Classes

How viable is “ending” a character’s class route as say War Monk, Trickster, or Dark Flier? Valkyrie comes across as a stepping stone to Dark Knight, but the others have utility that I just don’t get in some master classes. Dark Flier being a flying class just seems super useful for my play style compared to Gremory who I feel often get left behind.

War Monk and Trickster having the ability to use magic as well as their weapons makes me believe they can compete with War Master in some ways, while Trickster and Mortal Savant both honestly still being the sadness that is weird magical sword classes.

I’m not entirely sure if the stat bonuses of the master classes warrants the utility loss, so I thought posting here was my best bet. I honestly haven’t had problems getting these characters quick enough to hit and dodge consistently, so I’m interested to hear other people’s experiences in what classes are the most viable.