I know this question was asked a couple years ago below, but I found myself wondering the same thing so I decided to buy the augment and I put it into the weapon below and here was the outcome: (Mischief Server TLP)
Girplan Hammer of Carnage (Before Aug)
MAGIC ITEM LORE ITEM NO TRADE PLACEABLE
Slot: PRIMARY
Skill: 2H Blunt Atk Delay: 36
DMG: 89 Dmg Bonus: 61 AC: 40
Magic DMG: 1
This item is placeable in yards, guild yards, houses and guild halls.
STR: +21 DEX: +15 STA: +18 WIS: +16 INT: +16 AGI: +20 HP: +400 MANA: +400 ENDUR: +400
SV FIRE: +15 SV DISEASE: +15 SV COLD: +15 SV MAGIC: +20 SV POISON: +20
Required level of 70.
Effect: Life Sap IV (Combat, Casting Time: Instant)
WT: 3.5 Size: LARGE
Class: WAR PAL RNG SHD MNK BST BER
Race: ALL
Slot 1, Type 8 (General: Raid)
Slot 2, Type 20 (Ornamentation)
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Girplan Hammer of Carnage (After Aug)
MAGIC ITEM LORE ITEM NO TRADE PLACEABLE
Slot: PRIMARY
Skill: 2H Blunt Atk Delay: 36
DMG: 94 Dmg Bonus: 65 AC: 40
Magic DMG: 1
This item is placeable in yards, guild yards, houses and guild halls.
STR: +21 DEX: +15 STA: +18 WIS: +16 INT: +16 AGI: +20 HP: +400 MANA: +400 ENDUR: +400
SV FIRE: +15 SV DISEASE: +15 SV COLD: +15 SV MAGIC: +20 SV POISON: +20
Required level of 70.
Effect: Life Sap IV (Combat, Casting Time: Instant)
WT: 3.5 Size: LARGE
Class: WAR PAL RNG SHD MNK BST BER
Race: ALL
Slot 1, Type 8 (General: Raid)
Slot 2, Type 20 (Ornamentation)
The damage went up by 5 of course, and then it bumped up the bonus damage by 4. So for the aug to work you just need to find a weapon with the same delay and it will let you apply it. If somebody else tests it and finds out it applies to higher delay weapons and it drops the delay down, let us know!