Hi Scott, a few thoughts.
1. I agree with you that the bow pulpit is not strong enough to take the load of the guys.
2. I would do what you are suggesting - use the ring - with a few twists. When you are flying the Parasailor on a broad reach or downwind, the guys will be pulled forward and the strap will chafe on your bow seat. I think you will need to take that seat off. Alternatively, you will need to attach a third strop to the ring and lead it to a point aft so that it prevents the ring from moving forward. Or, mount a stainless strip that has a rigid eye above and aft of the board.
3. Rather than using blocks, you should use rings like the Antal rings I use. Cheaper and they don’t bang around. See the pic I posted.
4. If you use the Tacker, you don’t need the guys at all. I really like the Tacker since it stabilizes the sail a lot and simplifies rigging the sail. The downside is that it puts loads on a small part of the forestay foil and chafes on the rolled up Genoa I think only time will tell whether this is a problem. Lots of people use the Tacker for their cruising chutes so I suspect its ok
5. To prevent the leeward sheet from rising too high, you may need a barberhauler. I use an opening eye over the sheet attached to a line run to one of the cleats on the leeward side deck for this.