Have you experience about it?
2 important things need to remember when you send the token. Gas limit and Gas price.
1. Always set high Gas limit. If you do not sure how many is enough, you can set 100K - 150K.
2. There are 2 choices. Hurry: 10-15 Gwei. Have alot freetime: 3-5 Gwei.
And it seems that I have not failed to send any token with my solution.
Great example. I think it is not necessary to calculate to share. I often use 10 Gwei and everything works fine. It all depends on your needs.