Need help deciding fifth LOL team spot

So ideally id like to be able to 100% LOL itemless or as close to it as possible so I was thinking something like this:
My R5 sig 200 Aegon
6* R2 Guillotine 2099
Nick fury/quake for synergy
And I'm just not sure who the best options would be for the 5th spot so I would really appreciate some suggestions
I have a few champs at r5 I've heard good things about for lol like Colossus and stealthy I even have a 6* Doom at R3 but wasn't sure about using him since I'm not sure if I should run suicides to accomplish this or not so ya any advice would be awesome as well as I have Ht and red mags at r4 and about to r5 one of them
My R5 sig 200 Aegon
6* R2 Guillotine 2099
Nick fury/quake for synergy
And I'm just not sure who the best options would be for the 5th spot so I would really appreciate some suggestions

I have a few champs at r5 I've heard good things about for lol like Colossus and stealthy I even have a 6* Doom at R3 but wasn't sure about using him since I'm not sure if I should run suicides to accomplish this or not so ya any advice would be awesome as well as I have Ht and red mags at r4 and about to r5 one of them
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If yes then I'm leaning towards Heimdall over proxima to unit save on the final fight