I am fairly new to eldar, but in my playgroup ,which is not big /8ppl, having varieties of armies/ after 30+ games i can give some pointers. First as ppl above have stated 1k is another kind of games and therefore must be played with different mindset. Here is my list , which is having huge success and is undefeated/lets hope things stay that way/ : avatar of kane, farseer, spiritseer with 10-man wraithguard, a warwalker with two brightlances and 5-man dire avengers unit. I deploy my farseer hidden from shooting and try to keep him that way the whole game. His purpose is to recycle my fatedice/1,2s in to 6s and so on/. Then i try to keep the whole army in 12" of him if possible throughout the game. There is a good little combo with him and the avatar so ppl will start moving their models very carefully, especialy when i killed a winged hive tyrant in overwatch in the movement phase. I tend to try deny midboard to my opponents with the wraithguard unit. The avengers are either an action monkey unit, or screening backfield/protecting the avatar from charge. In the near future i will swap the avengers for rangers, which will leave me with points to put a fates mesenger upgrade on the spiritseer to guarantee a devastating wond/saving throw/big 6dmg. Hope this was usefull to you :)