First the list that I ended up running this past weekend.
Imotekh the Stormlord
Orikan the Diviner
-Harbinger of Transmogrification x4
-Harbinger of destruction w/ solar pulse
-Lord w/ warscythe, mindshackle scarabs, resurrection orb
C’Tan Shard w/ Writhing Worldscape, Gaze of Death
5 units of Warriors x5
1 unit of warriors x8
Canoptek Scarabs x8
3 Annihilation Barge w/ tesla cannons
So the gist of the list is as follows. On turn one everything is difficult terrain, forcing your opponent to take dangerous terrain tests with each move because of writhing worldscape. After turn 1, I would keep targeted limitations using the tremor staff on the harbingers of transmogrification, which makes any unit you hit move through difficult terrain through the next turn. Overall, I think that the list was fun to play and enjoyable, but it lacks heavy killing power. I am considering making room for wraiths because they are very hard hitting and would give me a bit more mobility.
The unit that had most of my command in it did very well in close combat all games. I think that I will be switching to using gauss cannons for a few reasons, but I feel I am lacking solid ways to deal with heavy armor, which is a bad thing to me, and it has a low enough AP to be a marine killer.
I guess the ultimate questions are as follow, should I try and fit in wraiths, would the bring me anything that I am currently lacking? Are canoptek spiders really worth it? I had them do okay in only one game, but most of the time they where for a tar pit. Any other ideas as well?