1:2 (although one mod may as well be dead... So 1:1) I'm rather practical so I don't find that I need to buy many mods or atomizers as I can only use one at a time anyway. I'm really not into the hobby aspect or collecting aspect of it as eventually they'll be worth nothing so don't see any sense to throwing my money away on something sitting on my shelf just to look at something shiny once in a while. To each their own though.
The above is what I currently use, although getting here I've thrown away a lot of money buying atomizers on recommendations of others and found they were little to no better than what I already had (only certain leaps made some better like from the disposable atomizers to the protanks, and the protanks to the aerotank and then the nautilus wasn't any better than the aerotank but the subtank was a huge leap forward to me), until I finally came to the subtank by kangertech, that's much better than anything I've owned so far so I'll stick with it. But if I had to actually count all the atomizers and mods that I've bought since quitting smoking, it would be something more like 30:5
1 eleaf 50w (currently using)
1 MVP2 (dead battery now)
1 Stingray mod (hated it and won't use it)
2 ego-twists (either lost or broken now)
The atomizers, well that 30 has a huge amount of throw away atomizers in that 30 count, the only ones that I still have laying around but not using at the Nautilus and the AeroTank mega and a bunch of Protank II's that I bought early on to keep different flavors in and maybe a couple of the iclear's and some off world tank called the Ninja by ecig or something like that (absolutely worst tank ever!).