UE is a lot about being at max distance and then timing cds with the CoE cycle. Earlier when I ran UE as my main spec, I sometimes used a CoE timer on a separate screen to help me get the flow right. (Just google one)
You also need to get those big packs and know which ones are worth killIing and when to skip small:ish packs.
personally I use UE for decent farming- awesome speed - but I really love the shadow/impale style for pushing. Others will probably recommend the Natalia/marauder spec for highest grifts. To me it comes down to finding a decently good spec that I find enjoyable to play
Still on vacation so general advice will
have to do
my rule of of thumb for grifts is to add about 30-45sec for each increased level (once you hit the ceiling). That would indicate gr97 being doable for you just now. But do check those multipliers and if you haven’t; add a bunch of 60-70 augments for some extra boost. You get those gems to 60 in like no time really (2 min/grift at gr70 and low risk, so can even Netflix at the same time )