Following up on my last question about a Shadow Monk/Assassin Rogue character. What's the best way to pick which class to level up in a multiclassed character?
Is it better to stick with one class until you get all the class benefits you want? Should you just stick to the stat increases (4th, 8th, etc)? Or alternate (up to a point) to keep the class features even?
I would like to clarify that I'm not aiming to utterly min/max my character. I'd just like to know what're the most important things to think about when levelling in this way - specific class features, ability score increases, or something else?
Also, my character concept is just an example so answers that cover multi-class advancement in general are good too.
If it makes a difference and for anyone that's interested, I'm thinking of ultimately aiming for a Monk 15/Rogue 5. The later Monk features don't stand out too much to me and the Rogue's 5th Level (Uncanny Dodge) seems better for survivability than the ability score increase gained by a 16/4.