Lvl 30 green weapons from giants Lvl 30-44

Lvl 45 green weapons from giants Lvl 45-59

Lvl 60 greens weapons from giants Lvl 60-74

Lvl 75 green weapons from giants Lvl 75-89

Lvl 90 green weapons from giants lvl 90-104

Lvl 105 green weapons from giants 105-120

Bloody weapons only drop from Red Meteonyker

Here is another chart if you want for green armor sets. They drop from the following monsters.
Lvl 15 green drops from
Lvl 13 monsters ~ Lvl 34 monsters

Lvl 30 green drops from
Lvl 28 monsters ~ Lvl 49 monsters

Lvl 45 green drops from
Lvl 43 monsters ~ Lvl 64 monsters

Lvl 60 green drops from
Lvl 58 monsters ~ Lvl 79 monsters

Lvl 75 green drops from
Lvl 73 monsters ~ Lvl 94 monsters

Lvl 90 green drops from
Lvl 88 monsters ~ Lvl 109 monsters

Lvl 105 green drops from
Lvl 103+ monsters

Also notice at a certain level the monster drops both levels of armor.

Thanks for your contribution.

If any other player can confirm this, then i'll edit my first post.