SS: You won't see any gods here that make it to ranked.
S+: Usually first pick/ban material and have an amazing kit.
S: Top tier gods, not quite in S+ in my eyes but close enough. Usually first picks and gods people look for first when gods in S+ may be banned.
S-: May lack something keeping them from potentially being S IMO. Similar tier all in all.
A+: Great picks, may or may not have carry potential, a bit over-average in their performance and/or kit in my eyes.
A: Average, balanced gods. Can perform well and might be there for a specific reason (and not in a lower or higher tier).
A-: I personally think these gods are a bit more risky to play, most don't have an escape but can hit extremely high to compensate. Most, if not all, of these gods require a lot of experience with the god to play. You can make these gods work but these are some of the last gods you should be looking to pick.
B: Pick at your own risk. These gods are not so viable right now. There are much better picks.
C: Any god(s) in this tier are hindering your teams overall performance. I would not suggest playing these gods in Ranked play.
D: Usually the gods people hover to troll. Nobody can make good use of any gods in this rank. Do not play.
*This is NOT an SPL tierlist, this a ranked tierlist, what works in SPL may but also may not work in ranked, especially considering 5man coordinated comms. Also take note that this tierlist is based on an overall perspective of the gods, taken everything into consideration (early/late/KIT/etc.)