UngeheuerLich
Legend
The wizard should never be in melee with that brute. Mobility should be hampered by his wounds (slowed). If the wizard get into melee, i reall hope he ends up dead with a single hit...
I think that's pushing "non-optimized" a bit. I don't think it's unreasonable to assume one of a) wielding a sword or other +3 proficiency weapon, b) having Expertise, c) having a 20 attack stat, d) having some sort of class-based bonus to hit, or e) having a +1 weapon*. Figure +7 to hit, so AC 22 is a reasonable maximum.
Of course, RangerWickett presumably knows how optimized the PCs in his party are.
The party is low-level, part of a larger expedition to hunt down a giant. They're present when the trap is sprung, and the giant is injured, but it manages to kill the rest of the NPCs the party was with, then use its size and the terrain to get away in the chaos. It limps back to its cave, horribly wounded and dripping blood all the way.
Or should I just stat it up as a level 1 solo, and just describe their "hits" as just barely grazing him, but being enough to wear him down.
giving it more thought, I would make a solo brute version of th giant in quastion, start him at bloodied, slowed, and ongoing 5 no save to end (he is crippled and bleeding to death... really play up the fact that even left alone he may not make it... then when he was at about 1/4 of the hp (or hs new bloodied) take the ongoing away and givehim an action point...(yes on top of the 2 he already had for a solo)...
I think it's reasonable to have a monster that can be hit only with a 15 or better on the die as a scary encounter. But requiring a crit is going to make for a frustrating battle (unless, you know, you have a wizard in the party who can throw magic missiles at the wounded eladrin, er, giant...).
In my experience, needing a 15 at 1st level to hit all of the enemies (in this case, the only one) isn't a scary encounter, it's a boring encounter. Once you reach 3rd or 5th this begins to change, but at 1st and 2nd it's very true.
At 1st level a (non-essentials) character has two cool powers - a daily and an encounter. (Some may have racial, but also some may have daily/encounter that fit better against multiple opponents than a solo so it isn't cool.)
So let's say the PCs each have two chances to do something besides an at-will. That's about a 50/50 chance (.7 miss * .7 miss = .49 both miss) that the character will be able to contribute anything but at-wills. Boring.
If you really want to run 1st level characters against something that you are going to miss that often, please put in other things for them to do besides at-wills. Fire-pits to try to bull-rush it into, a rockfall trap the PCs can re-purpose against the remaining giant, a giant sized crossbow sitting there cocked that's good for one massive ballista shot.