Strat: Run 1: find the ore trader, go to F2 and find the potion guy, get level 2 altogether and send your ressources to the closest elevator, kill yourself

Town: Upgrade Primary with 3 stars, buy blacksmith, get boots (and if possible Attack power 1)

Run 2-x until thief is unlocked: A1 boss is already quite doable, so just go for it (take ore on the way, maybe gold but ore is more important for now), reach A2 and hope for early thief.

Town: With 15 ore you can buy Guild Hall 2 and Tavern 1 (hope to get Enchanted Slamemr or at least Smelly Old Man, attackpower/crit drinks are okay, else hope for the Ore drink)

With Enchanted Slammer or other DPS drinks, fresh character can easily kill Golem, so go with thief and sorc (in any order)

At this point you should be level 3 (maybe more) on ranger, and get the guild rank up, with the added ore you can buy the Skill Building to next rank and get both Primary T3 and the speed passive T1. Along with maxed blacksmith (maybe not, armor is last to upgrade)

Next run: Enchanted Slammer, clear A1, clear A2, Warden is hard but doable, after that you can wander in A3 until you find a lift to get as much resources as possible.

After beating warden once, A1 portal should be easy enought and will be your pushing route, no more golem unless farming ore or such (BUT DO NOT PICK UP COMBO)

Town: Get potion guy to T1, maybe ore trader (He can help a lot !), Blacksmith T2 if possible In terms of skills, get Marked Prey T1 and the speed boost T2, maybe Flurry T2 but not more, else the mana cost will be too punishing (I almost never used the root spell so I don't unlock it, maybe it is worth, idk)

Fountain should be unlocked later in the game, usually while struggling late A4/Watcher, T4 primary attack is much more important (And maybe Powershot, but I haven't took it in my 3H run, it works well without it). Hope to finish the game on the first attempt with Fountain, you should go all in with general store, keys, and upgrades (potion slots/power, blacksmith T2)

Fountain setup: Gentle Traps, Safe Corridor, More Imps / More enemies, More Elites, No lift OR no Ore