You are not going to get 11 and 13 and an additional pick unless we pick 1 or 2 but 1 is out of reach and 2 or 3 seem unlikely right now.
The combined point value for 11 and 13 (2400) is just to high for a #4 or #5 pick (1800/1700). At best we would get the #11 (1250) and a 2021 1st round pick (590) and maybe an exchange of later picks benefitting us.
But I also would think that we only garner two 1st rounders if the Raiders are really really desperate. I probably could see it more like the Jets/Colts trade (#6 to #3) for Darnold. They exchanged 1st round picks and the Jets coughed up an additional three 2nd round picks (I think they still overpaid by one 2nd rounder but they were desperate).
The only time you really can get two first rounders when teams trade in the first round is desperation (if the picks are close) or a huge jump (like KC did for Mahomes and gave Buffalo two 1st rounders to jump 17 spots - from 27 to 10).
A real close compariosn would be the Buffalo and Tampa trade in 2018. Buffalo traded from 12 to 7 and got the 7th (1st round) and 255th pick (7th round) and gave up the 12th (1st round) and #53 and 56 (two 2nd rounders).
But hey, we took Houston to the cleaner on the Tunsil trade....you never know.