Redoing flower mattress – searching for recommendation on pavers.

Lastly getting round to redoing this flower mattress. The earlier homeowners of our home had all flower beds stuffed with rubber mulch 🤮. Bought the mulch eliminated and the flower mattress all the way down to floor stage this weekend. Subsequent weekend I plan to redo the pavers, add high soil, mulch, and doubtlessly some flowers or one thing (along with the small palm within the middle).

I’m going to purchase new pavers that may kind a 2’ circle (inside diameter). The flower mattress slopes down in the direction of the sidewalk, about 3.5” over 3 ft. I’m searching for recommendation on the right way to deal with the slope. I’m weighing a few choices. In all circumstances I’ll put down paver base and sure use panorama adhesive to maintain the layers collectively. Probably going 3 layers of 4” tall pagers excessive.

Choices I’m contemplating deal with the slope:
1) Degree the flower mattress to the bottom level, which might imply the primary layer of the upslope half of the circle would basically be buried.
2) Break up the distinction – i.e. deliver the entrance half of the mattress up with fill dust and the again half down.
3) Do it in two ranges, so entrance (downslope) half could be leveled and have three excessive pavers, again (upslope) half could be leveled so the primary layer of these pavers would are available in on the similar top of the second layer of the entrance half.

I’m leaning in the direction of choice two, however my solely pause is creating too steep a slope on the entrance half of the flowerbed all the way down to the grass, the place there could possibly be erosion or settling and the entrance half of the flower mattress would then sag down and be out of stage.

Am I overthinking this for such a gradual slope?