Easiest Game Mode to reach goals

As the Titel says, what do you Guys think ist the best Mode to reach your Set Goals, be it 1800 for the Set, 1950 for the illusion or even 2400. I wont Take the Queue time into consideration, purely the Skill needed to move Higher in Rating.

I feel Like 2s ist good because you got 2 Players less to track, but therefore probably meet Higher skilled Players on lower Rankings.

Shuffle is obviously the Mode where Most "casual" pvpers would Queue, therefore your chances of Meeting realy high skilled Players are lower in the lower brackets.

3s i only heard pretty Bad stuff about. Few Players, Lot highskilled Players playing their Low Cr alts so probably the hardest to climb?

And blitz feels Like a coinflip to me every single round 😅

What are your thoughts?