Depends what your goal is, if your goal is to reset a season you'll almost certainly want to group climb rather than solo
Some general info for group climbs here:
https://forums.d2jsp.org/topic.php?t=82759999&f=74A solo with very good gear takes around 2.5 hours as a minimum and usually closer to 4 hours. A lot of players take over 6 hours and often not done in 1 sitting
most group climbs on softcore are generally done in an hour or less, so can often do 4 of these in the same or less time than the solo would have taken.
For this you'll need either
Swords + staffs + axes with strength robes and dex robes and both strength and dex charms
Or daggers + axes with dex robes and charms
Will also need int staffs and int robes and a damage charm set and a heal charm set.
That's a lot of gear but there is a lot of classes to get through.
If your goal is to make fg, soloing is significantly better and the guide given in post 2 is pretty reasonable
For this generally most people either use a mage or barbarian, the guide posted recommends a barb
For barb you'll usually want a club set as you get a lot more damage per fg spent with strength charms and either ee armors or strength armors
For a mage an int daggers, int robes and damage charm Set and heal charm set