More than viable...
Health regeneration is sorely undervalued in my opinion but you're going to want to know some numbers I guess...
For a start enchanting isn't the way to go. The enchanting effect for health regen is actually fairly gimped in the game so if you're taking enchanting solely for better health regen dump it now and go after the in game items instead...
The number you want is at the very least 100% regen, anything less than this is still nice but not always noticeable enough to make a big difference. Once you cross that line it seems to suddenly become very noticeable during combat, health regen isn't punished as much as magicka regen during combat so it's always ticking away nicely in the background!
"Also I have seen a slight increase to my healing speed when Ihave regen
enchants and use a healing spell. Or I could be imagining it."
I'm actually unsure about this because I've not tested it enough. I can't tell if casting novice healing stacks with your characters current health regen or actually cancels it out.
If you have enough base health and a high regen rate you can actually simulate having the novice healing spell running permanently, I'm talking pretty end game here of course...
Go with the in game items from RR like Alastor said...
I don't agree that 80% is enough to get what Seth is talking about here though Alastor.
Obsidian Sentinel was originally posted with 280% health regen which was horribly OP. I reduced it to 140% health regen a few days later which is enough to regenerate between Death Overlord swings on master difficulty while blocking.
Aim for 150% health regen and see what you think, if your character isn't a blocker then maybe consider taking it higher and if you play on legendary then obviously go balls deep...
You would want to make a pretty powerful restoration potion (about 500%) and then use it to take the lady stone...
Then drown yourself and time how long it takes to recover. Then drown yourself again but cast healing at the same time and see if there is a change. I've tried this in the past but I was using weaker resto potions at the time and the results weren't conclusive enough for me to say for sure...
I only play on master from start to finish. I've never even tried legendary, master difficulty just feels right to me these days. I used to say this about expert though, maybe one day I'll try legendary but I've heard too many bad things about it here.
It's not just about difficulty it just becomes completely unbelievable when you're stabbing a wolf 10 times with a sword before it goes down. It takes about 4 swings I think on master to down a wolf for a completely fresh one handed character and it still breaks reality a little...
No you can do it in stages so you can run with 70% absorption at lower levels and then go and re-select later when you want to increase it...
For 100% absorption you actually only need to get alchemy to 40. That's enough to get 3/5 alchemist and the benefactor perk. You can get 40 in alchemy after only a half hour of play.
Atronachs can take down Krosis very easily for his mask and you make your potions with that and you're done.
I think you need to run at least one build that depends solely on alchemy before you can fully appreciate the skill. I remember learning alchemy for the first time and I absolutely hated it, it didn't seem to matter what potion/poison I made it provided no experience/money...
Even these days I can fully perk it and I still walk around with only a few potions and I never know when the right time to take them is. It's a frustrating skill because 99% of the time you're not actually using it, but if you stack the right combination of potions before a big battle you become a god, just for 60 seconds...