In 2E, an ogre has stats that don't change depending on the level of the PCs who are looking at it. That is an objective reality, and 4E fails to provide an objective reality.
As demonstrated by special relativity, the distance between two events, or the time between them, will change depending on the velocity of the person who is looking at them.
Yet special relativity
does model an objective reality. And the space-time interval is constant across observers.
Checks happen when there is uncertainty. If your blacksmith has +13 to blacksmithing, then a DC 15 check is uncertain, and a roll is required. Ergo, a smith who doesn't fail at DC 15 tasks must have a CR of at least 13 in order to guarantee a proficiency bonus of +5.
That is not how 5e measures
uncertainty. Per the Basic PDF, p 58:
The DM calls for an ability check when a character or monster attempts an action (other than an attack) that has a chance of failure. When the outcome is uncertain, the dice determine the results.
For every ability check, the DM decides which of the six abilities is relevant to the task at hand and the difficulty of the task, represented by a Difficulty Class. The more difficult a task, the higher its DC.
In other words, the GM
first settles the question of uncertainty, and only if that is settled in the affirmative does the GM then set a DC.
It is not clear whether the question of
uncertainty is settled by reference to infiction considerations (a bit like one approach to finding secret doors set out by Gygax in his DMG), or by reference to pacing/dramatic considerations (similar to various indie RPGs like Dogs in the Vineyard, Burning Wheel, etc), or both.
But it
is clear that the question of uncertainty is
not settled by reference to DCs, because that question has to be answered before a DC is set.
in the name of the little black pig what level were you when you were facing minon giants? The lowest level giant in the Monster Manual is the Hill giant at level 13 and it isn't a minion. And should only be minionised at around level 20. Either you were approaching epic tier fast, that was a bad homebrew monster, or someone at WotC really screwed up.
I think Revenge of the Giants has level 17 minion frost giants. In my own game, I ran a version of Glacial Rift of the Frost Giant Jarl (my own conversion, not Chris Perkins') at mid-epic, and some of the giants were minions.
I knew that my stats hadn't gone up enough to make a difference, so this should have been a big and scary fight.
It seems to me like this relates back to [MENTION=77932]ZzarkLinux[/MENTION]'s observation upthread (post 314): 4e is story/fiction first, not mechanics first. Part of the role of the 4e GM, in accordance with this, is to convey to the players, via narration and framing, the relationship between their PCs and the gameworld. You can't just read this off the stats.
This feature of 4e has come up in the past in discussions about the 4e Neverwinter book, which deliberately
changes this relationship compared to "default" 4e, by mapping the whole heroic to paragon arc onto the first 10 levels. (And as a result, that book has monster stats that aren't suitable for use in a default game, like high heroic rather than paragon mind flayers and aboleths.)
Are you aware that not all damaging effects require an attack roll?
I though you were talking about AoE attacks. If you're meaning SoT or EoT damage, then you needed to give your NPC friends out-of-turn movement. That's not all that uncommon in 4e. If you let them stand in the fire, or poison webs, or whatever, it's not that surprising that they suffer.