spells: Web, Haste, Dervish, Elemental Protection
I keep haste and elemental protection up, I never click to move, always use hamstring. Wind of justice is what helps you go up and down stairs, which are deathtraps. I have two sets of weapons, 90% of the time I use shield and pistol, the other 10% vs bosses I use dual wield pistols. Always keep 100% missile reflect, stack HP, crit, critical damage % and lightning resistance. (insta lightning beam attack bots of doom) I put about 35 points into str and magic, then the rest a 1:1 ratio defense and dex, defense raises both resistances and armor so its worth it, some people say no because of the way crit strikes work, but its definitely saved me. % damage reduction items are good if you can get good enchants without wiping them. Robya's gloves might be best item in game for hc.
This is what I mean, there is more than one way to skin a cat. For example, 3 people might use the same base skills (ES, CS, RWExp) and then build out the supplementals differently. I tend to go with pets until they are no longer feasible (one-shotted every encounter), someone else might use traps, the third might use spells.
So, that's why I was expecting to see some build guides for those skills/spells beyond the baseline.