No clue I'm sorry. I'd agree about high PG and freebase nic and just getting it as high as you can. Certain additives increase throat hit, and you may want to check that out (I was not in search of a throat hit so I don't know much about them). Maybe menthol will help.
Pods may be your best bet as far as similarity if you get the right pod. Honestly no ecig doesn't have a "disposable" aspect to it, you will need to replace pods eventually, etc. I'd say the Sourin isn't a bad choice, but there are others.
Good luck,
Anna