I just got the 28.5mm alliance v2 and the cloud chasing potential is amazing with this atty. huge post holes, huge well, lots of airflow, put some large coils in here and run high wattage and its a beast. So much build room in it (obviously being a big atty) but it's also nice having such a huge juice well. Ran a 22 gauge macro coil in it 10 wraps and it was awesome, did some twisted 24 macros 12 wwraps and they're an awesome vape, definitely love this rda.
doge v2 is meh to me, as well as the dark horse. Mutation X V4 is pretty nice, enjoyable vape with plenty of potential.