More for reference:
Orb and orb/fw are the 2 main options for cheap and effective
If you want to get GG gear thats a different story
orb/fw is at bottom
No idea whos guide this is originally
Code
Copied from JSP for Classic orb rusher sorc.
PvM Frozen Orb Rush Sorc
This build is really beginner-friendly, and it is one of the most effective and cheapest Frozen Orb Rush Sorc Builds in Classic Diablo II.
Gear
Helm: Iratha's Coil
Weapon: Spectral Shard
Shield: 3-Socket PDiamond Large Shield
Armor: Twitchthroe
Gloves: Iratha's Cuff
Boots: FHR 3x FR/LR/PR* or 2x FR/LR/PR* Boots OR Hotspur
Belt: Iratha's Cord
Left Ring: FCR 2x FR/LR/PR*
Right Ring: FCR 2x FR/LR/PR*
Amulet: Iratha's Collar
* Combination of any 2 or 3 Resists
Stats
45 Base Str, Base Dex, Base Energy, Rest Vita
Skills (Level 80)
20 Frozen Orb
20 Cold Mastery
20 Icebolt
20 Teleport
1 Static Field
3 Warmth
1 Frost Nova
1 Ice Blast
1 Glacial Spike
1 Blizzard
1 Telekinesis
With this build, you won't have to Mana potting constantly because of Maxed Teleport. For those of you who don't already know, adding points to Teleport reduces the amount of Mana required for each Tele. (Maxed Tele = 5 Mana per Tele, and 24 Tele from added skills = 1 Mana per Tele.) Adding a point to Warmth is optional for Mana regeneration, but I recommend putting one into it so you'll be able to Tele indefinitely.
Leveling
If you don't have someone to Chant you, please refer to the method below.
Get the Sorc to Level 20, and hit up Normal Cow games to Level 25-30. Once you acquire Frozen Orb, you can try Norm CSing to gain a few levels, or you can NM Cow with a group to Level 40-45. After this, play with a group through Hell, and get to CS; the rest of your leveling is done here.
Rushing Issues
It is a proven fact that there is no one Sorc that can effectively take on the entire game by itself, and you will need help when rushing, especially when it comes to Hell Act 2 and 3. So what about adding a second kill spell, you ask? You could do that, but from personal experience, it doesn't make the rushing any easier. If you are rushing someone, make sure you have access to another high-level character that can effectively kill Cold Immunes in Claw Viper Temple Level 2, Arcane Sanctuary, and Travincial - preferably, a PvM Barb.
Orb FWcopied from Ray(OD), but fairly simple build made 100 times by others
Code
Recently I've noticed an increased interest in the creation of classic rushers. Classic rushers (basically all sorcs) allow a character (excluding Druids and Assassins) to reach Hell difficulty faster by taking advantage of the fact that Act V doesn't need to be completed.
I use a Frozen Orb/Fire Wall hybrid Sorceress. Here's how I did my skills:
20 Frozen Orb
1 Static Field (This spell is more effective in Classic than Expansion)
A handful in Cold Mastery (You can max it if you want)
20 Teleport (Saves a LOT of mana)
20 Fire Wall (Deal with those pesky cold immunes)
20 Fire Mastery
*If you want, you can put points into ice bolt to increase Frozen Orb damage but it's not that significant
(Desired) Gear:
Spectral Shard Unique Blade - 50 FCR (Crucial to reach the 63 FCR Breakpoint) and some resistances
Full Irathas - Give you bonuses to all resistances and to all maximum resistances. (Includes gloves, belt, helm, and an amulet)
2x 10 FCR Rings - Required to reach the 63 FCR Breakpoint. Resistances on these rings is preferred.
30/10 Rare Boots - 30 Faster Run Walk (Not mandatory but nice) and 10% Faster Hit Recovery (super important in Classic)
The Ward Unique Gothic Shield - Big chunk of resistances
Twitchthroe Unique Studded Leather - Dexterity and Strength to help you equip items and nice chunk of FHR