My own little bit of potion/oil experience:- Blizzard becomes useless after you get a few levels under your belt and become more of a threat on the battlefield. It is quite a lousy potion, really, once you get a handle on combat; everything slows down including your controls! Don't mix too much of it, and by level 20 you should forget about it.- The only oil worth putting on your Silver Sword is Argentia. Tailoring oils to monsters is a waste of time and inventory slots. Go for "uberdamage to everyone" effect.- The best oils for your steel sword are Crinfrid and Brown oils. For regular battles, go for Crinfrid because it reliably disables your opponents and gives you a chance to pound on them unpunished. Brown oil is great for human boss battles, because bosses don't succumb to Pain (at least in my experience) - so instead, make them bleed for extra Damage over Time effect. Hanged Man's Venom may also be an option for DoT, but I haven't experimented much with it.- At any given time you should have in your sack: * Swallow * Tawny Owl * CatThe above three are absolutely essential. Swallow and Owl affect your regeneration (which means difference between reloading and surviving by running the hell away and regenerating, and without Cat you will have trouble in dark(er) places. * Golden Oriole * White Honey * Wives' TearsThese are your "toxicology first aid kit". In some cases, Geralt needs to dump toxicity FAST (if for no other reason than to save your eyes from popping out from all the red flashing). Poison can slowly, but surely send you to your grave. And intoxication has a way of sucking badly... plus, Wives' Tears is a great "cheat" for winning drinking games. Stop drinking midway through the game, drink the Tears and go back to boozing - your opponent will konk out long before you do. * Maribor Forest * Full Moon * Willow * WolverineThe "Ah canna' dee it!" set. Take more damage, cast more Signs, and, since every boss and sub-boss just LOOOVES to stun Geralt, give them and their attempts a finger. And since there's always a chance that they'll beat the crap out of you, give yourself a chance to snatch the victory out of the jaws of defeat.- Optional and highly useful potions: * Wolf * Shrike * Petri's PhilterGreat for when you need just a little extra edge, particularly in crowd control department, but not terribly necessary.- Disappointing potions: * Blackblood: if a vampire is biting you, you're doing something wrong. You probably screwed up crowd control, and while you were fighting one, another snuck up on you. Or you let them stun you. Anyway, a witcher worth his salt should not be bitten often enough to need this potion. * White Raffard's Decoction: ultra-toxic yet restores pathetically little. Easier to pop Quen, Yrden and run away to regenerate. If you HAVE to use it, have a White Honey on standby. * Thunderbolt: instead of making yourself vulnerable and taking on extra toxicity, put an oil on your blade. Lasts longer and doesn't fill up the green bar. * Blizzard: see above. * Bindweed: maybe I haven't found any super-acidic monsters yet? * Kiss: I got bled a couple times but the effect fell off quite quickly and I healed right through it. Seems a waste of inventory slot.- Potions "on steroids": make 'em even better with Albedo/Nigredo/Rubedo. Good combinations are: * Rubedo Swallow: heal faster than Wolverine. * Albedo Tawny Owl: drink it first for less toxicity. * Nigredo Wolf: two words - "more cowbell" * Rubedo Cat: for lesser-difficulty caves, this saves you the necessity to drink a Swallow.Hope it helps someone...