I don't want to get into a 3E vs 4E argument. Suffice to say, the former was an escalation of immunities on both sides of the table (immune to crits, immune to various elements, immune to death, etc.) to the point that usage of several abilities on the player's side (i.e. sneak attack) became frustrating ("why can't I use this ability?" and so on).
Fair enough, I wish there weren't so many binary absolutes in 3E, but the escalation is usually at least reasonable until very high levels. And I admit it's hard to keep things from breaking down at high levels. I'd like to see a few dozen more 4E supplements come out before I agree 4E escaped this same problem, though.
I've used illusions, fakes, and the like during my time but that only work a) so many times and b) on only so many enemies. Like that wild, rampaging beast (i.e. Tarrasque) isn't going to be a planner...
There's nothing wrong with the PCs using their favorite abilities and tactics sometimes. Not every enemy has to be immunized against a humiliating round 1 defeat. It's more about challenging the players often enough to keep them on their toes.
Again, those are ad-hoc solutions. Sometimes, the villain isn't going to have a support staff. Or healers. (And 3.xx encounter design is based on 4 PCs vs 1 Monster.)
I've never bought into that. I realized very early into being a DM in 3E that lone bosses were a bad idea. Most times, the weight of the party's number of actions alone will overwhelm the boss no matter what. Sometimes, the rolls go bad for the players, and suddenly those abilities the monster had that made it a threat even though outnumbered become very deadly. I often have my "boss" be a duo or trio, all of near equal power, to divide the party's attention. And if I do a single powerful foe, he's definitely coming with a support staff! And if not, he used said staff's lives to wear down the PCs resources before confronting them.
All that said, sometimes it's nice to just take it easy and let the players revel in being awesome.
Little makes playing PCs or running monsters more tedious and "bureaucratic" then having to have several buff spells active to just get on equal ground to your respective opposition. Rules Mastery (use these spells to gain maximum effectiveness) combined with book-keeping is a good way to remind me I am just playing a game.
And having to come up with ways to defeat player character abilities is also something that I as the DM don't like. I want them to use their abilities, and if I "pre-script" all defenses against their known tactics and spells. It just cheapens their abilities, and they begin to ask why they even have these abilities when they don't get to use them when it really counts?
As above, not all the time. Just foil their abilities sometimes. And if you really hate SoD, you can just ban them. Or make a "boss" template that makes them immune to really nasty things (and giving an appropriate CR boost in return). 3E is open, you can do lots of varied things to any enemy generally, unless they're by nature unaffected. That's one of the benefits of the system, but it also has its drawbacks. Still, I'd rather take a single line to ban extra things I don't like than have to write several paragraphs to bring in something I want that was left out of the rules. Further more...I like system mastery.
Wow, how would that conversation go?
"Look, faithful Tim, I would like you dress like me so that when we are facing a powerful evil wizard, he might just mistake you for me and kill you first."
"Oh yeah, I'll get right on that, boss."
Body doubles are used all the time in real life to protect important people and possibly have to take a bullet for them, so why is it so hard to imagine in game? And what villain poses it like that? It'd be more like, "Hey you, worthless scum I'm keeping alive only so long as you're useful to me. Put these clothes and wig on and stand in front of me. Ask any questions...and you cease to be useful to me."
And if you can't rationalize this, how can you rationalize the ridiculously over-matched goons charging the PCs and meeting certain death?
What?
Color spray and even Grease render you pretty helpless on a failed save, and they're level 1. Hold Person is level 2.
Granted, in those cases it's more like "save or wait to die" but still.
Not to mention sleep (level 1).
The person I was replying to was talking strictly about SoD, not save-or-lose/suck/run/cry/become my mind slave. Sleep is also a level 1 daily in 4E. And it does the same thing, makes the victims vulnerable to coup-de-grace. Except the 4E version has no HD limit or numbers limit, retaining its power at every level in return for needing two failed rolls. Beyond that, the only difference is that 4E CDG is less lethal than 3E's version, arguably too survivable (IMHO, at least).
Also, grease? The worst it can do (if you constantly, round after round, fail your reflex or balance roll) is leave you prone or disarmed. How is that anywhere near helpless? Not to mention at round/level, it's hardly worh casting at level 1 anyway...