*Updatet Version of an older comment of mine*
My highest wave so far was 17, but i did without any potions or arena preperations, will set things up and im certain to finish all 20 waves with that, keep you updatet.
My gear is rather unusual, as i used the cloud trick to multiple platinum coins.
Agile Coin Gun, 8000-9000 DPS, 85% Crit Cloaked (Only for Everscream and Santa NK-1)
Unreal Snowman Canon, 2500-3000 DPS, 88% Crit Cloaked (Killing the Minions with it insanely fast, first 5 Waves drop in not even 3 seconds, also used for the Ice Queen because of its Homing Abilitys)
Fast Clockwork Assault Rifle + Ichor Bullets (Only hitting every spawned Ice Queen once to inflict Ichor-Debuff and get around 3200 DPS with my Snowman Canon)
Full Shroomite Gear, Launcher Headpiece
Lucky Hooverboard
Lucky Golem Eye
Lucky Sniper Scope
Lucky Destroyer Emblem
Menacing Ranger Emblem
(Did this to get over the 85% Crit Mark, up on research and testing the damage output is significantly higher this way)
Ammunition : Ichor Bullets, Platinum Coins, Rockets III.
To not get bumbed around i use the Double Hook and anker myself with it into the ground, this way random hits wont get me out of position, increasing my aim. It doesnt replace a Paladin- or Ankhshield, but in my opinion its better to have 19% extra damage. After wave 10 however you need to un-and reanker at each beginning of the next wave because the Ice Queen will otherwise hit you with her Frostwaves right after spawning, which is to much damage to handle in most cases during the heat of the fight.
For Healing Purposes i have a full Spectre Armor with Hood in my Inventory + Razorpine in my Quickbar, just switching gear in midfight if my Hearts fall below one Red Bar and refill almost instantly on a Boss. (From my experience you need at least 5-6 hearts left when equiping the Spectral Armor in order to be able to heal yourself without getting killed by a random hit, which is the reason for the un-and reanker sequence i mentioned earlyer)
I assume this is the Absolute Edge of DPS you can currently archieve in Terraria Mobile, i played with the Tsunami also, but i realized that its DPS and usefullness (even with Heartarrows) dwarfes against the Coin Gun and Snowmancanon. Everscream and Santa-NK-1 despawn within 3 seconds, only the Ice Queen takes about 10-15 seconds due to the fact that you need to chase her in order to get all Rocket Homing triggers right and its DPS is less then 1/3 of the Coin Gun.
All Weapons and Gear took me about 2 Weeks to collect (only used the Item-Duplication-Bug to get enough Platinum Coins for Weapon uses, the Gear is probably earlyer to archieve with a higher amount of time invested in grinding) with a fresh started Character, together with some loadouts for meele (Terra Blade, Flairon, Fishron Wings ect.) which i wont post until someone asks for it, because it doesnt do even a fraction of the damage the Ranger loadout provides.
Would like to hear if in the meantime (this thread has a couple of days on its back) someone archieved to finish the Frost Moon Solo without the use of Traps.