Suggest the best wombo combo team
My suggestion would be:
top:
jungle:
mid:
adc:
support: 
My suggestion would be:
top:
jungle:
mid:
adc:
support: 
TOP :
or
or
or
or
or
or
or
or
or
or
or
JG :
or
or
or
or
or
or
or
or
or
or
or
MID :
or
or
or
or
or
or
ADC :
or
or
or
or
or
SUP :
or
or
or
or
or
or
or 
[poppy-wink]
top:
jungle:
mid:
adc:
support: 
All with stormraiders surge keystone and the following items

Ofc they would also all have the mecha zero skin
Choo Choo here comes the pain train
top
Jungle
Mid
adc
support
Top:
(top because it's a solo lane more gold more damage and it opens mid for vel'koz... then the 5 man suspensions obviously... and then after his ult his armor pen mixed with all the cc still coming through will make it super easy for him to clean up)
Jungle:
(knock up redundancy for Yauso while layering more large AOE damage with better consistency then a fiddle because of his stealth and dash)
Mid:
(balances ap and ad... massive magic/true damage ult and he is long range... and pretty much guaranteed to hit the full ult on most of the enemy team because of the almost guaranteed 5 man knock ups from top,jung,supp combo)
Support :
(ap build, support because he does massive damage with base stats the ap items he gets from his limited gold are just icing)
ADC:
or
(MF has contestant sustained damage across the entire enemy team but less 100-0 nuking ability ...however Twitch can nuke down 3-5 enemies depending on how well he can place his ult.... pretty much mf wont miss her ult but doesn't have as much potential damage as twitch... where twitch can get a huge 5 man ult and decimate the team but he also can get cucked and only hit 2 or 3)
top
jungle
mid
adc
support
engage with orianna e on rengar, she pops ulti as he jumps in, yasuo ults, miss fortune and vel'koz spew out damage from the back
If we're talking "everybody ults" type combos:
Top:
Mid:
Jungle:
Support:
Adc: 
If you don't ace the enemy team after a "everybody ult" combo, you've probably lost
i want to see
Top:
Jungle:
Mid:
Support:
Adc:
force picks force hecirim to be focused even if hes tanky and carries free to do what they feel like
Yasuo, Vel koz, orianna, ammumu(?), kalista
I would like to try this one:
top
jungle
mid
ap bot
support
then some rush
, some other
or
, morde ults drake, maybe they got herald, and noone can stop the push. I know, that its alot of ap, but i hardly believe magicresist will help your turrets:)
Wu top, Yas mid, MF adc. Most unfair teamfight combo I've ever seen.
Yordle bias: Gnar top, amumu jg, rumble mid, trist adc and kennen support.
Gypsy magic: illaoi top, sej jg, vel koz mid, varus adc, leo supp
Isolate and devour: zac top, kha jg, gragas mid, trist ad and naut supp.

Ashe AD Braum Sup Anivia Mid Lissandra Top Sej Jg
top:
,
,
mid:
,
, 
jungle:
,
,
, 
adc:
, 
support:
, 
Champions like
could be top/mid,
could also be top/mid/support/adc(?)
Honestly my ranked 5s team is usually
or
top with
jungle and usually that's good enough as long as you have a high AoE damage midlaner like
or
. Nobody in my team likes to ADC so botlane is usually a toss up
Also I would prefer a defensive support if my entire team is "all-in" (like
or
)
Top: Malphite
Mid: Orianna
Jungle: Amumu
Adc: Miss Fortune
Support: Yasuo
As soon as that Amumu engages, you get Orianna to Malphite to Yasuo all the while me is blasting away all through the the wombo combo. You can also sub Amumu for Jarvan