gnar trudle azir anivia graves
counter engage wombo time.

anivia maxes wall first sets up behind enemies likely dies afterward if not a miracle, trundle sets pillar at the corner of the wall, slightly toward the team fight and charges in, azir ults toward anivia's wall at an angle to acomodate for the pillar to bunch the enemy against it as much as possible, gnar stuns the enemies who are not completely stuck with mega ult, graves comes in from the side ults the targets while azir sets up soldiers and stabs who he can
still working on the details. let me know what you think.
edit: the most dificult part I'm finding is judging the distance of azir's ult, so you may have to engage+azir's ult first followed by mega gnar ult then trundle and anivia walls, then graves ult, but it should be a deadly combo. additionally, found roaming gnar tp to be very effective with both azir's and anivia's ults as noted in the video: https://www.youtube.com/watch?v=eZ3OPu21J-U and info about anivia+gnar it should allow for a tp kill 2 in bot lane and a roam kill mid when gnar is almost mega/ when pushing as a part of a team. tight corridors in the jungle work best for this group and the laning phase should mostly be focust on zoning, poking and harassing, with a little bit of siege potential with anivia wave clear and azir soldiers.
edit 2: a note from here on, any time I make a teamcomp, the names will be in this order: top jungle mid support adc.
edit 3: not really an edit, just a suggestion if it makes montage: https://www.youtube.com/watch?v=BH7AX4xQqAo
to see more: http://boards.na.leagueoflegends.com/en/c/fancreations/h5i4wezP-a-growing-list-of-works