Well I do have a Forgeworld Tantalus and I would... definitely not throw it in the face of a bunch of Primaris Marines. That game didn't make a lot of sense, the Dark Eldar were in a good position to be kiting while the screening units pressured the footsloggers into their corners but instead you pushed center field and took way more casualties than you needed to. Also I'm not sure why the Venoms were brought as a single Raider could have carried both of those Trueborn squads and delivered them just as effectively if not moreso, all while saving you points. The Reavers were just a bad call start to finish. Scourges with Dark Lances in a backfield Tantalus supported by a Haemonculus and screened by Raiders would have been a damned hard nut to crack and could have performed a refused flank on one of the corners while the other was tied down with chaff.
Really terrible videos about tiny plastic space elfs intended to help you get gud scrub:
Flawless pieces of literary perfection: