I have played golgari alot online and have found a few things out, Golgari is aggressive and needs to be played as such.
Lotleth Troll
is the engine that runs this type of deck and
Grisly Salvage
is a poor substitute for the troll, even if you are digging into your deck, you are better off playing
Sign in Blood
4
Dreg Mangler
is essential in the deck after a turn 2 troll that has gotten 2 +1/+1 counters on it from tossing a
Slitherhead
to it, which is why i run 4 of these guys, that is 7 damage on turn 3 on a god draw and consistency is what you look for in any deck
I run 3
Mutilate
as my board reset and a few more swamps to power it up.
Deathrite Shaman
would be in the sideboard for me, he is too slow and is runs counter to this type of deck, but if your meta has alot of graveyard shenanigans, then by all means run him. I'd play
Rancor
in his place it gives your creatures not named Lotleth Troll trample and a boost.