I suspect a sorc or pala to be fastest if you twink them out with prepared gear.
Sorc with mana on kill and low level req high quality items. Holy Fire pala with prepared gear second.
i´ve a prepped gear for this. Tarnhelmet, Eye of etlich, +3 Holy Fire szepter, a few pieces sigon and a few res charms for cs and diablo. Just walk through the acts. everything is max 2 ticks from Holy Fire. bosses die in 10 hits max. You can also use Ravenclaw, but i prefer the extra dmg from + skills
You can check out some NG+ runs if you want to see what a truly optimized Act 5 rushing setup looks like for each class. Naturally, the Sorceress is #1 on the leaderboard and it's not even close.
A couple of eye-opening discoveries that significantly improved my Sorceress rushes were the Gnarled Staff of Charged Bolt and Gnarled Staff of Frost Nova. Iirc, both can be shopped from Akara on higher difficulties & clvl's. It's been a long time since I looked--so I don't remember the most efficient way to find them--but it's possible to purchase staves with Level 11 Charged Bolt or Level 8 Frost Nova charges that can be equipped at very low levels. I have a couple of each just to help with the charges:
These staves have higher level requirements on non-Sorceress characters (7 and 12, respectively), but on a Sorceress the requirements are much lower (0 and 6). That makes them exceptionally strong leveling tools early on.
One of the bigger advantages is that using charged skills doesn't Consume mana, so you're only limited by how effectively you can group enemies. Both staves are powerful enough to one or two-shot many of the earlier monsters you'll encounter while rushing, making the early game dramatically faster.
If you browse those files on GitHub, you'll see that there are a few other very exciting low-level items that you can acquire, but most of them are exceedingly rare or expensive to craft. The jewels and rares they use are largely impossible to find, but it can give you a sense of the theoretical ceiling. One of the more obtainable albeit costly items would be a Level 16 20fcr Caster Amulet. Here is one from Jymnasium:
I hope to craft one of these myself one day, but it is difficult to justify the amethysts and jewels that would be required.
At the time I made that, I was going heavy into poison damage. You can give your level 1 sorc a bow with enough jewels of envy to be doing hundreds of poison damage. It's very fast at early leveling. But I eventually became convinced (partly due to NG+ runs), that it wasn't as fast as actually just using the sorc but making her better.
I will definitely look into the staff charges. That would make the first few levels even faster, after which you have enough skills and gear to stop using charges.
Don't sleep on stamina from charms. It's really helpful.
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Bobfromwork
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