bigbywolfe

"Everyone's a hero in there own way, in there own not that heroic way."
~ Captain Hammer

The details would depend on how you wanted the ability to work (so it might be based on Aid, or on STR with Usable On Others, etc.), but I think the key is that you apply a Limitation that it can't cause the recipient's STR to exceed 50. The value of the Limitation would depend on how you built it, on what typical STR values in the game are, etc.

50 STR (50), Does not Add To Existing STR (-[custom, figure the appropriate value for your campaign]), No Effect If Existing STR is >50 (-0)

As is typically the case, I don't have much idea what you are meaning to do.  I can only read what you said.  You said your big issue was that allowing this kind of all-out attack with a bow is not realistic and you would not allow it.  That left open the questions of whether you acknowledged that:
 
 - this is a deliberate choice to depart from the rules as written, not an "interpretation of the rules" call;
 - your "realism" is cinematic; and
 - your "realism" even accords with reality (I didn't address that one as I am not an archery expert, although it seems reasonable that over-extending the bow to get more power would have negative consequences like reduced accuracy and/or limiting reaction speed so losing some DCV).  You also said "I only allow haymaker for melee weapons or fists", and I noted that I do not see how we assess real-world realism of projecting flame, sucking out a target's soul or overriding their neurons with a potent burst of pure mental energy.
 
TL;DR - you seem to have difficulty differentiating between objective realism (e.g. "violence causes long-lasting effects, a reality not consistent with repeatedly being knocked out by blunt force trauma causing no long-lasting in-game effects) and your own subjective interpretation of realism ("there is no possible valid in-game special effect for an all-out attack with a ranged weapon enhancing damage at the cost of evading counterattacks").
 
Oh, just to spare another poster on the thread some time, I know you told me so...in fact, I thought of that very exchange as I typed my initial comments further up.

Striking Appearance, Insects find you repellant

When looking at costing for limitations I try to figure out how much of the time it will affect the outcome of the attack. Here, I would say that the limitation is more powerful than your opponent buying penetrating on their 3d6 killing attack (on average). So that is a significant amount (22 points), but defenses always cost way less, so a value of half that (and only for the body, so actually a quarter or so) would be in the right range.
 
Another way to figure is using the limited power chart. I think it is not affecting you more than half the time since you have other armor and it's a window of 5 body. DC's in FH heroic are going to be in the 6-10 range so I think this will come into effect more than 1/4 of the time. I'd say somewhere around a third or 2/5ths of the time seems right, which would put me at a -1/2 limitation. That's around 5 points saved total, which works out to around what I speculated from the amount it would cost to defeat.
 
If the average DC's will be greater than 6-10 then you can probably bump it down to -1/4 since it will always be used at full in that case.
 
- E

IMO, that should be in the Cute thread, not the Creepy thread.

I don't mind the races. 
 
It's the commuters riding dead center of the lane at 5:00 a. M. Without so much as a reflector, who constantly switch between pedestrian rules and road rules, all the while maintaining a self-righteousness that defies the fragility of their situation.
 
One of the many blessings of cooler weather is the thinning of the hazard they represent to themselves and everyone else. 

I remember when the Teen Titans title crossed with Batman and the Outsiders, joining up to fight the Fearsome Five. There was friction between Bats and Robin (Dick Grayson) throughout, but Batman still assumed overall leadership. But in the ultimate issue Batman started issuing orders that Robin strongly disagreed with. Bats told him, "Robin, you're out of line..." to which Robin retorted, "The hell I am! I know the Titans better than you, and I know more about running a team than you do! I won't let you endanger us all just because you like being in charge!" It was the moment Dick Grayson finally stepped out of Batman's shadow, and he never looked back.

You can't lose a homing pigeon.
If it doesn't come back, what you've lost is...
a pigeon.
(Mitch Hedberg)
 
 

I can't take credit for this -- just saw it and thought it was funny.
 
Most Aggressive Dog Breeds Ranked
14. You
13. Can't
12. Rank
11. Them
10. Because
9. Aggression
8. Isn't
7. Breed
6. Specific
5. It's
4. A
3. Learned
2. Behavior
1. Chihuahuas

He glanced up at the listening shelves. POSSIBLY IT WOULD BE SIMPLER IF I ASKED FOR A LIST OF THE HARMLESS CREATURES OF THE AFORESAID CONTINENT?
They waited.
IT WOULD APPEAR THAT–
“No, wait, master. Here it comes.”
Albert pointed to something white zigzagging lazily through the air. Finally Death reached up and caught the single sheet of paper.
He read it carefully and then turned it over briefly just in case anything was written on the other side.
“May I?” said Albert. Death handed him the paper.
“‘Some of the sheep,’“ Albert read aloud. “Oh, well. Maybe a week at the seaside’d be better then.”

No more dead smooshed (real) critters!

I just say a quick prayer to Anoia (Goddess of Things That Get Stuck in Drawers).  Usually does the trick.  Though she has gotten busy since the Post Office reopened.