This is help for SV monotype, champions monotype is not an official meta and is something you should ask in the OM showdown room not here. Secondly, if you are going to play VGC, we can't help you either because this is for singles. Just because you really want doesn't mean you should ask here.
However, I can certainly help you. I play champions a lot, both BSS, and VGC. This first section is for singles. I think mega aerodactyl is significantly better than mega raptor but since you seem focused on it, I'm going to keep that. Since you seem to be using this on champions ladder, I will assume item clause as well. Firstly, gyarados and talon flame are not needed. Like genuinely speaking, they are not pieces worth considering. Talonflame is terrible because of stealth rocks and gyarados is imo not worth it because better dragon dance pokemon exist. For singles, go with defog spdef corv, physically defensive spike skarm, toxic gliscor with protect and leftovers, sash aerodactyle with stealth rocks, dragon dance (prob roost) dragonite, and your mega staratpor. In singles, protect is not used so it's not worth considering.
For VGC, a monotype team is VERY hard to make work, especially flying because most are weak to rock slide. However, I would replace the gyuarados with charm nuzzle emolga. Then add rage poweder sleep pwder vivillion and have a charizard-Y as secondary mega. Sun helps the basc MU, also, replace bb with dual wingbeat on talonflame. Another option is to have aerodactyl be the secondary mega because mega aero with max speed, outspeeds basc. Then, instead of mega zard-Y, you can run a bulk up corv which allows you to have more flexibility into TR as they have to focus their resources on that.