Best way to train research and access ogre/erudite city as an human necro?

[LordVictor]

I'm lv 24 necro at moment. Playing in archlinux with wine and am my first time playing p99. So far, the greatest problem that I had besides the first 12 levels, was to get some research spells. To get haunting corpse, I had to farm a lot of spider silk to get lots of platinum and buy it in EC cuz I din't found a single word for this spell.

I also tried to combine Cazic-Thule with the Words of radiance and din't got the spell. How I can train my skill past lv 16?

Other question.

There are lots of spells in ogre and erudite city but I"m KoS in both cities. I din't got lv 20 animate dead thanks to it. Any way to get access to both cities?