Aggron vs ttar
In my family we have 3 accounts, we can comfortably do a ttar together with 30 seconds to spare, given this are we able to do a aggron together, I've given a screenshot of my team this is similar for the other accounts
Answers
That is the best team I have clear weather may be common for you but for me it's cloudy all the time(good for aggron) I know Rhydon isn't optional but it's the best I've got, I have one weather boosted groudon but it has munched through 30 tms so far and no earthquake, and I don't have the stardust to power one up from lvl 20. My question was can we do the aggron, not how can I improve my team, have you ever considered a job in politics, you're very good at not answering questions directly
As raid bosses, ttar and aggron have the same hp, however, aggron's def stat is about 50% higher and overall the movepool of aggrons are defensively better than that of the ttar. So my guess is in average aggron is at least 50% more difficult, probably more. Of course there is a big difference in terms of difficulty among the 6 different moveset combinations. Generally speaking, if you have only 30 seconds to spare against ttars, I don't think you can beat aggrons.
Basic assessment is this is nearly exactly the borderline. 3 people using all lv30+ fighting types can take it and 4 people using all ground types can take it. This mix with some non-optimal movesets would be somewhere in that 3-4 person range. I'd find a friend to tag along for the first go round, then you can re-assess. Also, I have no idea what the other two accounts would be coming with.
