I was unsuccessful posting my first two replies, so third time's a charm...
Note: Imgur was being a real pain when trying to upload these images. I had to view each image individually to get it post properly here, but for some reason, the images are HUGE. Only click on the spoilers if you have a nice amount of Internet data/don't mind letting the people around you see big pictures of
mostly waifus.
I have three teams that I rely on to get through Lunatic 7, and if they fail, I just Surrender because I can't use any more Heroes {XD}. Currently sitting at 60,000 points and I'm taking a break to try to do Legion Infernal. So close...
Team 1: Cecilia, Olwen, Xander, Lucina. Just a standard Horse
Memes Emblem team with Lucina tacked on the end for Reciprocal Aid support and bonus points. Veronica's debuff is a pain for this team if her allies keep her protected, and some of the earlier floors may be able to cheese one of the team members and therefore cause the rest of the team to fall apart
something something stupid Wings of Mercy something something stupid dancers.
Team 2: Celica, Bride Cordelia, Bride Lyn and Olivia. This team is basically made to blow up Res-squishy enemies (Celica) as well as Def-squishy ones (Bridelia). Lyn keeps the team healthy and is super useful for blocking Veronica for Celica to safely kill and Olivia is invaluable in letting team members avoid being hit. I've started to use this team as my main one to grind more HM, and they can usually do all seven floors by themselves. The only downside is that I don't get bonus points this way.
Team 3: If both teams fail, then Team 3 is bound to succeed, as it is made to specifically deal with the seventh floor. G Tomebreaker Lilina just absolutely ruins Veronica's day, and Julia perfectly handles the mage threat on the floor that Celica and Bridelia may have struggled against (e.g. Reinhardt). M!Robin nicely deals with any colourless and can tank Reds if need be. The fourth slot is flexible, but it's usually Lachesis, Catria or Camus (which I've only been using very recently because I've just finished levelling him).
Don't mind all my unused SP. I kinda tend to forget that the thing even exists unless I'm outright losing battles.