Board Thread:Card Unit Builds/@comment-30392240-20170421140828/@comment-29974411-20170421154550

Below is just my opinion

If you must choose a card from your list, then it will be Shiroyagi in terms of overall usefullness(End Game, Flexibility). Buffers, especially a high % all element one, which Shiroyagi is, will almost always be useful a lot of teams and generally we need 2 buffers in each team.

Although I would say if you can wait and hold on to your Mirror Maiden and that currently you don't have any 9x+ Multihitters(E.g. Halloween Hades, Ixtab), it might be a good idea also to wait till you get 1 and use Mirror Maiden on them as competitive ranking revolves around having these cards(Multihitters).

In the Beginning, Lu Bu will definitely help a lot in your team but she is not as useful in the endgame. Considering Mirror Maiden is pretty hard to come by, it might be a better idea to use on a card that is useful in the End Game.


 * Shameless Self Advertising* If you are interested, you can take a look at my wiki blog, What UR Cards are worthy for Mirror Maiden? for some references/ideas :)