you need script_blood and player_meleeanims for them both to work
all .dsq and .dts files inside player_meleeanims need to be placed into base/data/shapes/player folder within the blockland files or blood wont appear on the player and animations for the weapons wont appear (weapon_melee_base and weapon_throwables)
script_blood is just a normal addon and should work normally
iirc you need to take the folder thats inside the zip out for it to work, that's what happened to me at least