I'm an beginner-intermediate skier,...groomed and ungroomed trails.
Why this ski? Here's a pretty devastating review where the reviewer doesn't like it for much of anything, especially what you're asking for. This sounds like a ski to stop your skiing ability progression. And why a 98? Too wide for anything on groomers except smear turns.
K2 sez "“The Annex 98 freeride ski is designed for hard-charging skiers looking to shred top-to-bottom runs down the fall line, whether in-bounds or just outside the ropes.” You aren't the hard charging skier.
Blister sez: "we’ve got a fun-shape ski in the front half, and a fall line charger in the back half....this isn’t my favorite flex pattern. I value consistency in a flex pattern as much as I value any aspect of a given ski’s design. So I’d personally rather ski a uniformly soft ski (e.g., the Shreditor 102 or the Line Sir Francis Bacon) or a very stiff ski (e.g., 13/14 Volkl Mantra or Salomon X-Drive 8.8). If the flex pattern is more uniform, the ski generally has a pretty big sweet spot and throws up fewer surprises while skiing. ...those flatter, stiffer tails aren’t super conducive to smearing your way through the moguls, so the better your technique, the more I think you’ll enjoy the Annex 98 in moguls. (And the more uniform the mogul lines, the faster I think you’ll be able to rip through the mogul fields on the 98. In messed-up bump lines at speed, I’d personally prefer a ski with a more uniform flex pattern. There are far better crud skis out there.... ...I wasn’t comfortable skiing fast down the fall line on the Annex 98’s in these conditions. The shovels just felt too insubstantial to drive hard, and yet, when assuming more of a centered stance in this deeper snow, I’d end up weighting the tails of the skis more than I’d want to, causing the skis to feel rather grabby."
In any case, we know that as skis are made longer, they're also made stiffer. The longest length in any line is made for the biggest, strongest skier on the mountain. That isn't you (nor me). The 177 would do you less harm than the 184.