I highly suggest revisiting this with a team of staff to organise. Your mappool seems irregular and random and you should have Hidden/Doubletime/hardrock/nomod/freemod options - and a tiebreaker
Usually mappools will increase with difficulty. Group stages in even the WC were starting at 5*'s - Id suggest 4.5* as a starting point from looking at what you have currently selected. Get a group of individuals who are strong at each mods to select the maps of such mod's. This ensures the maps are of good quality and playable with the selected mods. Or get highly ranked maps which are known to be good for such mods.
You should look at already established tournament threads to figure out all the information you need and to get an idea for mappools!
Here is a well planned out tournament thread:
https://osu.ppy.sh/forum/t/449600You may not need to put in everything they have but itll give you a good idea on what you need!
I would join up if I believed this was well planned out and would need some information such as
; Schedule? When will the first stages start?
; Rank Limits? Having an unlimited ranked tourny is always a bad idea - i suggest looking at the difficulties of maps you plan on playing
-- For example; 6+* rated maps would not be suitable for ranks below 100k - which is what you currently allow
; How many teams will be accepted?
; Number of rounds?
I really do like the fact you are trying to sort out a tournament and do believe it will be a lot of fun!
I am only trying to help and wish you luck with your tourny!
PS; I will gladly help out with anything in regards to the tournament!
^^