8 peasants would only have about a 5% change to hit a level 8 Barbarian (because AC and Uncanny Dodge), meaning that there is about a 40% chance of even 1 bolt hitting the barb in the first place. After which, the surprise round is over. So, no.
I was talking about the barb unarmored and taken by surprise and of course, they hitting. But my point is : I like when you can kill and die fast. Bullet sponge enemies are a huge problem on turn based or real time.
Also, can take out and is likely to take out are two different things. A lv 1 wizard with a finger of death scroll can take out a adult red dragon in one round but is extremely unlike that the dragon will fail his FORT save on 3.5e...
He definitely can, but let's see how likely that is. The wizard needs to succeed X separate rolls:
1 - the wizard needs to make a caster level check (with DC 14) to activate the scroll, because his caster level (1) is lower than the minimum required to cast Finger of Death (13);
2 - the wizard needs to overcome the dragon's spell resistance, so that's another caster level check (this time with DC 21);
3 - the dragon needs to fail his fortitude saving throw (he has a +18 bonus and the DC for the scroll is 20).
Since we are talking about our average adventurer, it's reasonable to take the elite array for his abilities (15 14 13 12 10 8). To even try to activate the scroll we need at least Intelligence 17, so we must put 15 into Intelligence AND pick a race with a bonus to that stat (like the gray elf). We can pick a feat and, since our main obstacle is the dragon's spell resistance, we are going with Spell Penetration.
Let's calculate our chances:
- since our caster level is 1, we need to roll at least 13 to activate the scroll (thats 8/20 possibilities);
- to the caster level check to overcome the spell resistance we have a +3 bonus, so we need to roll at least 18 (that's 3/20 possibilities);
- to fail its save, the dragon has to roll 2 or lower (so that's 2/20 possibilities).
To calculate our chances, all these events need to happen at the same time, so that's 8/20 * 3/20 * 2/20 = 48/8000 = 3/500 possibilities. In conclusion, we just need to find around 20 brave level 1 wizards and equip them with 20 scrolls (2,275 gp each) and we can reasonably expect to take down the dragon.
So much for the winged menace.
Of course, we also need a way to reach the dragon and attack him before e breathes, but that's another story.