Dirty Trick #345ish: Prevent divination spells from being used against you.
Vecna-Blooded (MMV) requires you to answer 7 riddles of Vecna and be able to cast 2nd level or higher arcane spells to acquire the template.
While the riddles are undefined the low spell requirement serves as a point that a 3rd level wizard can do it. At best they have 22 int and 6 ranks in knowledge skills for an at highest DC 31 assuming 19s are rolled. Such numbers are well within a Factotum's abilities or for that matter anyone donning multiple +30 competence items they plan to sell off afterwards.
Steps
1. Die. Well, become a necropolition.
2. Get spell stitched for spells and acquire the Vecna-Blooded template.
3. Get a cleric to cast raise dead on you, thus you are no longer undead and no longer spell stitched and thus no longer qualify for Vecna-Blooded.
4. The cloak works even if you lose the template.
5. Profit!
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Dirty Trick #346ish: Hate, unlike Love, does more than hurt.
BoEV's dying curses are simply epic.
Steps
1. Find an ECL 17+ evil creature, binding or gate works fine.
2. Mind Rape an evil creature so it's willing to place a dying curse on your target.
3. Kill the raped victim thus placing 10 separate and saveless greater curses on the target; notably 1d4+1 of it's allies become permanently blind
and deaf and flat out block their spellcasting.
Even the most powerful of the powerful fear ending up in your torture chamber of drug extraction. Points over Love's Pain in creativity and sadism.