Dies to Removal

Check out my Tajic list. That's probably as douche as it gets for your group.

It leverages all the strengths of Red/White. Basically a decently aggressive list with indestructible creatures and enough BLOW IT THE FUCK UP to keep your opponents off their feet.

Probably one of the simplest generals to start building cutthroat with is Thada Adel, ramp style.

Cram in a healthy contingent of multi-mana mana rocks aside from Thada, fast mana a la Grim Monolith, Mana Vault, Sol Ring, Mana Crypt, Thran Dynamo, Gilded Lotus, Everflowing Chalice, Phyrexian Metamorph, Worn Powerstone, Copy Artifact, Scuplting Steel, Extraplanar Lens, Tezzeret the Seeker, maybe Gauntlet of Power. That gives you a level of mana ramp in conjunction with Thada that ought to be ridiculously unfair.

While ramping, sit back on around 10-12 counterspells, adjusted according to your meta, sprinkle in some blue removal (Pongify, Rapid Hybridization, Curse of the Swine, etc.) and some good creature theft to the tune of about 8 slots total, pump in
Knowledge Exploitation/Time Stretch/Time Warp/Temporal Manipulation/Walk The Aeons/Diluvian Primordial/Notorious Throng(if you roll that way), finish with things like Lightning Greave'd Eldrazi (don't forget Pathrazer of Ulamog), Memnarch, Sphinx Ambassador, possibly Rites of Replication, Blightsteel Colossus, Bribery. The rest of your deck is just about every card draw spell you can find that generates three or more cards for you: Stroke of Genius, Jace's Ingenuity, Opportunity, Mind Spring, Braingeyser, Recurring Insight, Concentrate, Deep Analysis, Tidings, Jin-Gitaxias, Myojin of Seeing Winds, Blue Sun's Zenith, Jace the Mind Sculptor, etc. Mystical Tutor doesn't hurt.

Add Back to Basics, and you're pretty well set.

You're monoblue, so you've got access to counters and removal, but you can also ramp much faster than what most other decks are capable of doing. If you're in a position to be aggressive fast, you can potentially start casting hasty Eldrazi turns 4-5 with the right start, but
you're also well-positioned for the long game, since you don't have to over-extend or burn cards from hand if you don't want to, but can quietly ride on the back of Thada, build up massive mana and/or card advantage, and wait for your moment to strike. Since you can grab other people's Lightning Greaves basically at will, it's pretty easy to arrange for a hasty threat to come down and basically one-shot people at your discretion, without giving them any opportunity to react.

You should probably just choose one or two of those rather than try to do them all. Infinite combos mixed with land destruction seems bad.

Sharuum combo is extremely powerful, for the record.

IME, Arcum Dagsson's pretty good at griefing a whole table.