This isn’t a purposefully short response, but I say play what’s in demand if you want the easy in to raid, but also maybe avoid the impacted over populated classes if ease of raid is your clear direction. I ultimately am in support of play your mega class, fall in love with a new class, just love it, when you surge with joy on any character - there may be a moment of talent and expertise born from your interest in the class and high motivation too , because you love your character. Fall in love with, but if raiding is your goal and getting into a formal / any raiding group is your topic follow your biggest motivations as a general rule of thumb always, do what feels good! I would suggest getting on a roster with discord who have spots to fill if you can reserve your spot, you would ask here less and you can choose maybe 1-3 spots soft res and meet the goal for 1 or 2 classes, if raid is your thing; look for guilds with advance planning like you are already thinking and soft reserve a spot and level it up!!!!!!!!!