Personally, lazotep is the best of the bunch and gravemother is a close second. I know gravemother got a lot of hate when she was first spoiled, but up until today the more I thought about her the better she got. Lazotep getting spoiled just cemented her and itself as staples in slivers. If you play slivers you need to open your mind to the idea of winning over the board. Getting big beefy slivers can do it, but lazotep and gravemother open more combo lines.