fSTR can be negative so Forager's is universally better; the oxymoron being that this is better when you don't need fSTR but in these situations the mob is usually so weak, you don't need attack either.
I wouldn't use it in SA or TA; it is critical damage anyway so adding further attack doesn't do as much as you would expect :x
@ Jeniffer:
Forager's Mantle is better for TP 99.9% of the time. It is very rare that the 2~4 attack difference will beat 3STR.
This is actually decent, better for higher base damage 1 handers than lower base damage or 2-handers. The primary niche for this is vs HNM (unless I'm incorrect that you can't have -fStr), where it's difficult to melee in +fStr. Also very good for very high base damage Sneak/Trick attack sets. For Str based WS's though, I'd agree to use a different mantle for +WSC's.
This is better then forager's mantle(if 1Str = .75Att still)..17.25Att on forager's 20Att on this mantle.. Charger > Forager's. Unless u want the Str for WS mods. Great mantle for Mnk