Apocalymon, Susanoomon, Lucemon Wild Mode/Shadow Lord Mode/Satan Mode, Alphamon King Dragon (Ultimate War Blade King Dragon Sword/Ouryuuken), Omnimon X, Dexmon, D-Reaper, Yggdrasil, UltimateChaosmon, NeoCrimson, Super Mega Arkadimon/Super Ultimate Arkadimon (Arkadimon Full Power), Super Demon (Super Mega Demon/Super Ultimate Demon) and NEO. First of all, ZeedMillenniummon is not the outright most powerful Digimon as GranDracmon could be equal to him if not greater. Second of all, some of the Digimon or Digital Entities you have chosen to oppose him are not some of the the most powerful Digimon or Digital Entities. As I said GranDracmon would be among the top 13 as I have previously stated. Yggdrasil, NEO and the D-Reaper would be as you stated (3/13 so far). However some of the Digimon you have choosen while ranked high in the overall powerlevel list do not reach top 13. So the previous 4 would be ranked among top 4 of 13 against Zeed Millenniummon, top 13 no.5 would be MaloMyotismon, top 13 no.6 would be Imperialdramon PM, top 13 no.7 would be Ogudomon, top 13 no.8 would be Armageddemon, top 13 no.9 would be Alphamon King Dragon and top 13 no. 10 would be Dexmon. I admittidly am not sure which entities should be ranked 11-13 (So far thats 5/13). However Apocalymon, Arkadimon Super Mega and Super Demon would definatley not fill those spots. However, I will admit that Lucemon Wild Mode/Shadow Lord Mode/Satan Mode would be a good candidate, as would Susanoomon and Omnimon X (that would be (5-8)/13 of the most powerful Digital Entities). I admittidly do not know where to place UltimateChaosmon or NeoCrimson in terms of power. I should also note that I am speaking of Digimon whose power levels were established prior to Xros Wars. Third of all Digimon deals with a Multiverse construct rather than just a single Universe construct.