For wildlife photography, a fast CFE B card is essential to handle burst shooting without lengthy buffer clearing times. The Sandisk Extreme Pro 128 G...
The off camera flash like Godox AD200 Pro is also great for Z6III.
My old DJI RSC2 is still a great gimbal for Z5.
Buy R7 now, or you'd better wait R7 Mark III version. Because R7 Mark II will not have a lot of improvements over original r7.
Godox AD200 Pro is a good choice overall.
How much will it cost ?