As a support main and off-time carry. For support. I go voodoo everytime. Like you said it pretty much keeps people under control, that hero is absolute fear to be against and discourages any attempt at trying to try something in the lane, especially if u pair it with a bursty carry, prefer ravenor, gemini. Voodoo alone with any other burst hero that can make cursed ground a threat in its self is alrdy hard to deal with and usually requires the help of a third party to balance out her lane presence. Slither is.. meh, I mean she works.. But lots of con's, iffy attack animation, short range. Its only good to have her in the enemy carry lane with another cc hero like prisoner if you plan on feeding on the support or carry. Martyr is martyr. In short, if I had to chose a hero who has to be the most aggressive, good animation, long range and absolutely discourages fighting in a lane, go with my bae voodoo.