I believe it's the Blood Orb that works best with Necromancer spells.

I myself think that while the Time Master, Elite, and Annihilator guild are all very powerful, Necromancer is the one I usually opt for. Maybe it's because it was my first guild, and maybe it's because the High Necromancer is so cute. I love that guy...but it has great status spells, and it fits with the 'cool', wicked ol' background Lars displayed when he was younger. Heck yeah.

When I played Aveyond my first time I chose the Necromancer guild. Only when read the walkthrough later I heard about other three guilds. Now I use the spell goodie, or choose the Time Master guild, because I like time spell more than other ones.

Searched around the net for a while to get a detailed description of damage and benefit of each guild and can only find mp use and name.

Which is the best guild for Lars to acquire the best offensive spells for the later 3 or so caves/interior areas?

thanks

There you go. All the answers you'll get.

Charmed orb and the Time Master Guilds are the best. Most time spells pack quite a punch like Gate Extra (forgot how to spell it),Last Hour ,and Riptide. Most enemies are weak to them.