Which units do I build?
What tier lists do I use?

The Tier List Problem

Why shouldn't you rely on tier lists and build all the S tier characters?

1. Tier lists don't tell you WHY

If you don't know when, where, how, and why units are used, there's no point building them!
Units that synergize with your existing roster are better than an "S rank" unit who plays alone.

Many tier lists fail to provide a reason for their ranks; This can hide biases or misconceptions of the author.
This is especially true for PVP tier lists. Personal experiences  

2. Every account is different, every journey is unique

3. Meta shifts

So who the hell should I build?

PVE units