Bogardan Lancer is a good card as use bloodthirst and is sinergic with proliferation.
Bloodcrazed Goblin is good but only at the beginnig. better 2 than 4.
kamiìs flare is quite sinergic with bloodthirst. it cost more than
shock but a 3 damages remotion is quite better than a 2 one. if you add 2 damages to enemy if you have a bloodthirst is always better.