it is not really worth taking the lictor. The power doesn't activate until after the lictor arrives. So, turn 2, comes in on a 3+ (assuming hive commander). IF the lictor comes in on turn 2, you gain the benefit on turn three (1+ to enter). However, IF the lictor does not enter, the benefit is lost. The only time you would re-gain the benefit is if you lost your hive tyrant.