Vit makes any sense?

Vit does not add MP. Only HP.

I never bothered to read the guides I have since found here, already having my own concepts of what I wanted. Nor can I offer a blueprint of the route I have taken but In the beginning, I built up not only Vit but Mag as well. It was only after about lvl 30 that I really started going the Str/Dex route. Now I find I can pretty much do anthing solo except FB's over 19 and the bosses (but then besides a Veno, who can take on bosses solo). My advice is to include Vit and Mag, as much as you are comfortable with (I have 30 in both at level 55). (insert scorn from other archers here)
There's no 'right' or 'wrong' archer. Best advice I can give is to keep your weps and armor as close to your level as possible. Learn to make Life Powder and Focus Powder, both are worth the time to farm the materials. Farm any logs or coal you find so you can save money on arrows (1 coal dust and 1 log make 100 arrows).

As was stated, there is no "right" or "wrong" way to stat your toon. That having been said however, there is an "optimal" stating process for each class. That is to say, there is a stating process for each class that gives the best returns per point for that given class' strengths and weaknesses.

As for adding mag to an archer....at level 30, you get a quest for the eagle wings which do not consume mana while flying. In addition, if you keep winged shell leveled and use it when fighting, it will replenish your mana. Personally, I use the following macro when grinding: winged shell-->serrated arrow-->normal shot-->knockback-->normal shot. I generally won't use any other skill after that series unless I have alot of misses and the mob is just on me pounding me into sand. That happens maybe 1 every 30 mobs or so, and by using that sequence, I haven't bought nor used a single HP or MP pot in right at 10 levels (My archer is currently lvl 48).

As far as adding vit, I was doing that very thing when I first started my archer but the mobs were constantly getting to me and I was having to use HP pots from getting hit. I bought a restat scroll and realigned my stats to only 3vit and 3mag and put the rest into 1str, 4dex per level and oh my what a difference it made!! The end result being what I said before.....I haven't bought or used a pot in right at 10 levels. In fact, I pick up hp and mp pots all the time and they go right into my bank until I have a full stack at which time I'll sell them.

a full dex archer can pretty much solo everything except fb's and the bosses. in fact, anyone with any build that doesn't completely fail can. if its regen that you want, get some gear that has +hp/mp regen. my archer has a total of +15 hp regen from equipment, cleric buffs me and i feel like a barb when i meditate, if i ever do need to meditate.

also, +3 mana regen from equipment as well.

look for these things to make your archer life easier

You really shouldnt add vit u can get the hp back from your gear in later levels. As a pure i have more hp than most archers my level from pumping my gear. It may seem like u need the hp early on but it becomes fairly insignificant later and reduces ur damage a lot. I think i have a post from a while back explaining ill look for it.

in a squad w/ a barb usually waiting for the magic flesh ream icon in an instance mob before firing is sufficient, no matter how much i crit they wont come charging at me as long as its a barb of my lvl or higher and the flesh ream is there.

or you can always wait for the mob to take some damage first before ripping it apart. in short, you shouldn't nerf your damage potential due to aggros because there are ways of managing it anyways.