Toadally Atlantean Dark Knight Lancer

This deck is able to get a strong board with layers and is a lot of fun to play. If you are looking for an Atlantean deck to play without the degrenerate handrips and barrier statue lock then you came to the right list! 

Your main goal is to get Coelacanth (Level 7 fish) out and summon 2 level 3's and 2 level 4's (Only works if Coel is the only monster in the main monster zone; you can have coral/Nept in the extra monster zone and be fine). Then, Xyz summon Virtue, search for "Virtue stream" activate Virtue's effect to add a Fish, Sea serpent, or aqua and search for either Toad package or more Atlantean extenders/ Harpooner if you have the materials for dragite. Then, overlay into Fortress, search for Reincarnation and full-armor trap (If you have either in hand try to get fortress to only 1 mat to detach so lancer combo is possible during your oppenents turn.) It should be noted that IF YOU CAN try to get "Neptabyss The Royal Mermail" on field before detaching for cost for either virtue or Fortress to activate his effect to search for Abyss-sting to then reborn an Atlantean or Mermail monster depending on what you need for your end board!

or if you don't want to go into lancer package: Synchro Summon into Cora dragon, if you have Princess on field/ in hand with your normal summon you can; Normal summon princess, activate her effect as cost to send dragoon to GY, search for Deepsea minstrel or Shadow Squad (With dragoons mandatory search effect and depending on your situation and hand) and with Princess's effect add Poseidra to hand , then synchro in prima dona and try to get a level 3 tuner to go into chen or gymir depending on turn and board/ what your oppenent is playing.

Those are some baseline combo's you can do but I heavily recommend trying out different strategies. editting the deck to your playstyle, and experimenting with the many different lines this deck can follow depending on your opponents deck and whatever interruptions you encounter.

Also, if they were cheaper I would have added in some Mulcharmies or Impulse's.