What I did was add all the stats that will require any kind of investment even 1 or 2 points and the spare levels of each class. (spare level as the Cleric has the highest of 14, so the deprived which starts at lvl 1 has 13 spare levels)
This should be relevant for anyone doing a build which does not use any magic/faith.
STR + DEX + VIT + VIG + END + ADP
warrior: 53
knight: 54
swordsman: 49
bandit: 55
explorer: 50
deprived: 49
Class info: http://darksouls2.wiki.fextralife.com/Starting+Classes
Personally I'm going with Knight. Bandit is technically better however I'm doing a STR build and I don't think I need that many DEX points.
Haha, I did the same calculations earlier today. Yeah, Knight and Bandit are great for physical stuff.
For a pure physical build, with 40 Vig/End/Vit/Str/Ada and 20 in Dex, this is how the classes pan out in terms of final SL:
182 Warrior
180 Knight
185 Swordsman
178 Bandit
193 Cleric
197 Sorcerer
184 Explorer
185 Deprived
Edit: I meant how many times they need to level to get those stats, my bad.
Edit2: No, it does mean the final SL. I can't make sense of my own stuff anymore.