I finally tried out Ziggurat and Phase Anchor. Very powerful combination. For the other weaknesses the ship has (75 DP, hangar queen+, auto-ID), it had better be overpowered. Even then, not every enemy is easy to take down. (SIM Paragon is annoying with lances and extra shot range.) Since it lost Phase Mastery from last release, it needs something to keep it overpowered or at least worth 75 DP and other weaknesses, and Phase Anchor helps.
The auto-ID with Ziggurat means I often cannot use it in core worlds (to raid or kill quest fleets or patrols that get in the way) unless I plan to go to war with everyone and wipe them off the map. That leaves Ziggurat for bounty hunting and Ordos farming. Also, its huge CR cost means I probably want another capital as backup, and that adds to the skill DP pools. I do not want to wait more than ten days before my fleet can fight again. Especially Ordos farming. Okay, it can smash one Ordos (or two at the same time), how about the other five or so closing in immediately after that first combat?