I've on/off played this game for years and never tried Alliance Chieftain. Looks like I've missed so much. I absolutely love it. Visually it looks great and performance surprised me even though this ship does have a reputation. With moderate top speed and strong thrusters this maneuvers without constant boosting and at least in PVE engineered frags are pretty insane if you can maneuver to point blank range. Also I've never really used hull tanks outside AX-combat and have to say I like it too. Fast regenerating weak shield with good resistances takes what it takes but if it falls it means nothing when monster hull is there to back it up.
And here's a short video of me courageously attacking NPC Anaconda basically without shield but it doesn't help Anaconda very much:
Source: https://www.reddit.com/r/EliteDangerous/comments/z5j5xv/chief_where_have_you_been_all_these_years/