Once you open the guide, I hope you understand why it took us a bit of extra time to release it. But here it is:
Our full guide on all available 4* Servants and why, or why not in some cases, you should pick them.
No shortcuts, we’ve covered all 42 Servants, even if they are massively unpopular choices (such as some of the starter Servants). Hopefully there are a few viewpoints in there that are new, or that reinforce your decision to go with what you were thinking of.
In addition, as bolded at the top, if you really want a certain Servant, but for whatever reason failed so far, then I really recommend you go with that no matter what. The gacha is miserable enough as it is.