Things really have changed with time. There's still a lot of old thinking out there being passed on as gospel, but I think there actually is a fair degree of what constitutes appropriate treatement.

I just took a WFA (Wilderness First Aid) class this past summer. They recommended no tourniquets, splinting, cooling, cutting, or sucking. They recommended keeping the victim calm and evacuating to the nearest medical facility where antivenin (aka anti venom) was available. A Sawyer Extractor has a good reputation with insect bites but was explicitly not recommended for snake bites. The only first aid they recommended was to wash the wound with soap and water and cover with a dry, sterile dressing.

I think that (wash, cover, keep calm, evacuate) is where modern thinking is. Tourniquets, splinting, cutting, sucking, cooling, etc. are older ideas which have not stood the test of today's evidence based medicine -- there's no evidence that these older ideas help; indeed, particularly with cutting, there is evidence that the technique actually makes things worse.

Home remedies/folk medicine such as carbon poultices probably wouldn't hurt anything, but I wouldn't bet my life on them. Home remedies and folk medicine should never be substituted in the case of a life threatening emergency such as a snake bite.

I am even more skeptical about any electrical shocking of the body. At best, it's a highly controversial, highly experimental technique. While I might be willing to beta test softwhere, I for danged sure am not going to be a beta tester with my life.