solo isn't optimal to 0-100. it's always good if you can get someone to boost you to wt4 to be able to start low level hordes solo. but if you still want to play it solo 0-100 then 0-50 live in helltide wt2, 50-70 helltide wt3, get to wt4 as soon as you can and open maiden in helltide, they will be a lot of people coming for free loots, party them up and leech the xp. once you're comfortable running hordes tier 1 yourself, that's the way to 100.
always have incense and potion up for xp boost