Welcome to Librarium Online!
i was thinking about going eldar or nids and i was wondering is mech eldar competitive in tourneys?
There's a skimmer Eldar thread close to the top. Check it out.
Short answer: heck yah...
If you use it right it can be.
Its quite satisfying to watch your Banshees and Scorpions hop out of Wave Serpents and make it CC on the second turn.
"What do Humans know of our pain? We have sung songs of lament since before your ancestors crawled on their bellies from the sea."
- Farseer Eldrad Ulthran of Craftworld Ulthwe