For example, when you're in one of those giant crossroad rooms in the new tileset, you can Cataclysm in each direction to blow up containers all over the place. You can easily wipe down the map just by spamming Cataclysm all over the place. I still say Limbo is the winner though, with Cataclysm being a ranged ability. Gauss is another decent option, since you can run around the map very quickly, and every time you smash into walls it breaks nearby containers. Alternatively Kuva Ogris with Primed Firestorm, it can hot through walls, and has a large explosion radius, and then you can just pick your favourite Warframes. You do have to generally aim in the direction you want to as opposed to above, but if you don't like Xaku or like a bit of variety, then Zephyr, to me is second best.

Her 2 will break boxes, and you also normally want to build for range anyway. If you are looking for the new Angels of Zariman medallions/Void things, I wouldn't really recommend Golden Instinct, as the map basically has a built in Golden Instinct feature basically. ADDITIONALLY - Helminth Greedy Pull on to your build, and you can be even lazier. Also, if the enemies are being killed a lot automatically/effortless, you should see more blue orbs drop, which lets you spam your 4 more in new locations. So if you run around looking for Medallions, you can ignore most enemies, since your stolen guns will be killing them. Build for range, which is good, because his 4, the box breaking ability scales with range, but also his best offensive ability, his 2, which steals enemies guns, also scales with range. I can't say I'm super familiar with how any of the specifics of the abilities work but at least with Banshee I know you don't need LoS or LoE for it to work. Last min addition since I turned to google before posting: Apparently Xaku is also highly rated for an increased max range over Limbo.

I've been using a few large area blast weapons to help my searches and I'm still about ready to give the Helminth Ability a shot(and yes I know it's terrible, so bad I don't even remember the name of it!) (As much as I do enjoy crawling around maps it's getting a bit tedious to spend 30+mins and still not getting all the 'medallions'). And I know there are the sound queues for the interactables that may give you the projection of the kid that'll lead you to a 'medallion' but I'm still finding myself hard pressed to find all the randomly generated ones in the missions. Do people still find these to work /w the new Angels maps? Maybe it's just me but even the smallest map for an Angels missions feels considerably larger then the ol Grineer or Corpus ones. The usual options were either Banshee w Sound Quake or Limbo /w Cataclysm(and of course prioritizing range over most other other ability modifiers). So there's a 'tried and true' method of level nuking to find syndicate medallions, it's not a method I generally relied on as I knew many of the places to look before this was as much a thing(or maybe I'd just never heard of it back then).

Map of the looter