Here are some links to Forum Threads I've studied that cover Tendrils and Rector builds. You may find them very helpful:
http://www.themanadrain.com/cgi-bin/ikonboard.cgi?act=ST;f=16;t=4303http://www.themanadrain.com/cgi-bin/ikonboard.cgi?act=ST;f=16;t=1944http://www.themanadrain.com/cgi-bin/ikonboard.cgi?act=ST;f=1;t=6414http://www.themanadrain.com/cgi-bin....94;st=0http://www.themanadrain.com/cgi-bin....13;st=0I'm not sure if Glimmervoid is the direction "everyone" is going, but Smmenen has a Long.dec list that uses a couple of them...HOWEVER he still runs 4 Gemstone Mine. While I know the decks are different archetypes, I think you should study out "why" Long.dec would run 4 Gemstones over 4 Glimmervoids. There is discussion about it here:
http://www.themanadrain.com/cgi-bin....t=12064I have played against a Tendril's deck that used 1 Illusion's in the main, and it was very consistent (in a good way). The deck only ran 1 Tendril's. It's mentioned in a couple of the threads I just gave you, so I won't repeat it here.
Do you find Future Sight to be a good fit for this deck?
Just looking at your list for the first time, I think you might consider running 3 Scrublands, 2 Glimmervoids, and a Gemstone Mine. Your 2 Scrublands give me the initial impression of being a little light on the availability of White Mana sources.
--Dave.