I'm thinking maybe 3 void-gates or 2 and a Strange House in the Mist (if it works) "crash-sites" guarded by indep nations of illithids (this is early game, so they're the only ones) led by a Void Lord or three. The void-gates would be matched with Vale just to make them extra-dangerous. If it works, I'd pair the House with a site that produced insanity, and guard it with a nation of independent voidspawn formless and Late Era Atlantians led by a Dagor (Dagoth, Dagwood, whatever the name of the Atlantian giant fish-frog pretender is). Then there would be maybe two other sites that would produce star-spawn, "landing-sites" also heavily guarded, this time by illithids, troll slaves, and heavy-duty voidspawn led by rogue Aboleth Mind Lords and the void shroom pretender. I'd also put a handful of other sites which would look more or less identical to the set-ups I mentioned, just so you'd never be positive you'd located a component. In all cases, they'd be either A: an island surrounded by water, B: a lake surrounded by land, or C: land surrounded by mountains (of madness?), just to keep holding such a position a little more precarious.
Ofcourse you wouldn't have to, but you could seek out such sites, and-at great risk and trouble-set up a functional void-gate, which may or may not be a good idea
