Champions that do not work well in Nexus Blitz

Here is a list of champions I've comprised that have a much harder time playing effectively in Nexus Blitz:

-Ivern (His passive is obsolete. Like you really can not use his passive in this mode for some reason.) -Shaco (Just altogether to much vision on the map for him to gank. You'd really have to make the perfect picks in order to be affective) -Cass (Not impossible, but not easy. Most people play champions that are on top of you, which is a Cass issue) -Support Build is just not an effective way to go. Events are to combat/damage heavy and if you can't consistently poke/obliterate others, you're putting yourself at a disadvantage. (Support Build) Janna (Support Build) Soraka (Support Build) Sona (Support Build) Nami -Skarner (Is he good in any game mode?) -Nasus (Too farm reliant unless you get lucky and constantly stack off enemy deaths.) -Singed (His kit doesn't provide much during events, kinda making the game feel 4v5. He's just sort of in a meh spot in this mode) -Rakan (Too support based to be able to do much. Kinda same thing as Singed. He provides a little, considerably short, CC but after that. He's not providing anything more.) -Zed (I don't see a lot of Zed's do well with this mode, I can't pin point as to why. I think it's mostly because tank/bruiser is a very frequent choice for a lot of people, causing him to not put out nearly as much damage. He can feel as though he fell off early even if he gets a few kills. Still good against squish comps.)

This is just from my experience since it's the only thing I play atm is Nexus Blitz. If you feel different about a certain champion, please speak up an effective strategy you've found that can help us all out when picking these champs.