Our duo/trio loot at Helwyr has always been worse than our duo loot elsewhere, at least in terms of splits from an hour.
The amount of sub-100k drops you seem to get at Helwyr is more than elsewhere too - and if you are discounting all big drops (essence included), Helwyr is definitely worse.
Unslain Bosses - Clan
I usually don't discount essences because of how common they are compared to the weapons/crests... Also don't count dormant anima stuff because it's worth less than a coal drop
Maybe I/we are just lucky with Lantadyme drops... Last duo I did we had over 1k of those alone. Those are sort of the "carry" drop for Helwyr... Like Battlestaves are for Greg, ashes are for Twins, and Dragon bones are for Vindy. Each boss has that one thing that's like half the profit per trip