CON
80-140
I pumped most of my early point into CON reaching 130 quickly, this allowed me to be tanky, get my hands dirty, and take some shots when taking those long pyro pauses when casting. No matter where you fall in this range I've set, or you decided to disregard this, either way con is nice stat to have early.
Spirit
30-50
I personally put 45 spirit into this early which helped, but later down the road I found that it didn't seem to matter to much. I never run out of mana, unless I'm using my summon extensively which is going to happen either way, and when resting beside a campfire my mana takes seconds to be full again. So, take it or leave it. I personally would try to hang on the lower side of this stat, and put them into int later
Int
~Everything Else~
After I hit 130 con, and 45 spirit I've dumped every single point into int after that. Since I reached a stable hp level, and no mana issues seems like a reasonable time to start gathering some extra fire power. That being said just dump the rest into int unless you want to be more tanky. But, this is what I did, and 0 issues making it to alchemist.