[Omnirizon]

1. Earth Attack; Vengeance of the Dead; some Blood assassin rituals (Horror summons of some sort). Which is best depends, VotD can be a cheap shot since it can create so many dead that the victim can't kill them all and auto-dies. I think all around Earth Attack is really good.

2. I don't know. I didn't think there was a seducer attack summon.

3. Owl Quill; Skull Mentor; Lightless Lantern. Lightless Lantern is considered the best partially due to that it uses fire gems which are not considered as useful all-around as other gem types.

4. I wouldn't really care about Battle Arena. Also, ``the best'' is completely dependent on situation. However, there are a few high priorities for all around thugging:
* Amulet of Antimagic
* Luck Pendent (or Silver Coin or Faithful)
* Boots of Flying; Boots of Quickness; Boots of the Messanger
* Marble Armor or (Black Steel Full Plate for undead); Rainbow Armor; Chainmail of Displacement; Bone Armor
* Dragon Helm; Horned Helm; Horror Helm; Spirit Helm; Wraith Crown; Starshine Skullcap (for maximal MR)
* Charcoal Shield; Vine Shield; sometimes Eye Shield
* Fire/Frost Brand; Demon Whip (A cheaper fire gems only Fire Brand without the moral boost)

for non-caster undead, I also like Lycanthrope Amulet

5. What do you consider to be the best clothing to wear when leave your house (if any)?

6. Summon Treelord

7. What is the best and most efficient universal way to play the piano?



Lastly, your asking the wrong questions; there is no best. There's only clever nasty tricks.