Scripts/Eye of Eternity: Remove some flags, fix some timers and some misc

* Starting timers were a bit slower
* Destroy platform proper timing for drake casting mount spell to player (trigger)
* Remove IMMUNITY_PC flag after Iris is triggered (thx to Expecto) and readd it on evade
* Remove NOT_SELECTABLE flag since shouldn't be present at starting event
* Fix misc of id of Static Field added to LOS attributes