the dive lost 3 hits. 102, 100, 100. 6c lost 1 hit, 146. Result 4811 damage.
There's no restriction on having to do 2 hits off 623D. Getting 3 is the best damage, in CSEX too. Direct ~300 damage lost on whatever you might have done.
Here is something that should work too.
5C>6C>衣始>D灯>特殊閃>D剣>D風(溜)>6C>6CC>B閃>B剣>B風(溜) 6001 damage.
Name is tomo.
Try this.
5C>6C>衣始>D灯>特殊閃>D槍>D光>特殊翼 5259.
5C>6C>衣始>D槍>D光>特殊翼>D灯>特殊閃 4966. (Fake combo)
The rest all comes down to the details of what can combo after what, etc.