Ok, this question i can offer some insight into. This was the last of the doggos that i needed to farm. I tried to get it done at the end of Shadowbringers, but bad party luck(the one mechanic Jeeq mentions*) lead to my putting it off. I picked it back up this summer, and have recently(within the last 60 days) put a night into unsyncing this fight. The fight can be killed by a duo if both know what to do and play well enough. With a party in the 3 - 5 or 6ish range you need to place the markers right for the meteor mechanic, then one or two people need to be in the safe spot when everything explodes and then they can either finish the fight or res enough of the team to win. I experienced all these variations while farming for my mount. But if you can get it, theres a gold standard. A party of 1 tank and 7 DPS will typically defeat her before the meteors even become a problem. I literally remember walking into my first farm party for this over the summer. When i joined, i asked if we were doing the typical strat for the meteors(the one i learned in Shadowbringers, the one Jeeq mentions). No one knew what i was talking about(or at least didnt react to it). Their plan was just to get enough damage that the mech didnt happen. And true to form, it worked. From there its just: waiting for your piece to drop, waiting for you to win a weapon coffer, or you to complete the fight 10 times and get enough totems to turn in for the weapon you want. So in case i wasnt clear OP, this is totally an achievable goal.

*And i do mean bad party luck. Back then you ran a fairly typical farm group alignment to make the fight easier to handle - 1 tank, 1-2 healers(usually 2, but one could do it if they were good), and 5-6 DPS. The mechanic "randomly" assigns a meteor to a tank, a healer, and a dps to be dealt with(if any role was missing, the extra would be assigned at random among those left). So the one tank would always have the same meteor to deal with, one of the 2 healers would "adjust" to the open end(the healer part was easy - just run to the opposite side from the colors and group then run back once the meteor was placed), and then one of the 5 DPS at random would have to put the last piece in the right place. So the problem you would see time and again would be that 2-4 of the DPS would know what to do, and if the right person got the marker(and noticed, and didnt panic, and reacted fast enough, and didnt get turned around) you would be fine. But if the wrong DPS got the mech they wouldnt do it right because "in the small color close to the end of the crescent" was clearly too hard(or it would go to the right person, but they were out of position/looked away for a second too long/a dozen other ways to screw up a mech even though you know it). If you were lucky there would still be a safe spot in the tanks side, if not there was no place to stand to avoid death and the party wiped to Supreme Selenomancy... over and over until they got lucky with the correct DPS getting randomly chosen by the meteor. Or after 2 or 3 wipes and trying to explain what to do someone would leave, and the party would break up. Or the worst would be the party would be great, and everyone is excited to spend an hour or two farming so everyone can get the drops they wanted. Then after one or two wins the mount would drop, and then the person who won would leave the party. Along with several of their friends who were only along to help. And now the 3 of us left are screwed and back into the PF hoping to get a good group together again(or just as likely, all quit in despair). I was seriously so down about this last november that it took me almost 6 months to put "doggos" back to the top of my to do list.