Exeggutor Offensive Move Set

c/sbeam (legacy moveset)

In my opinion they are roughly equivalent.

https://pokemongo.gamepress.gg/pokemon/103

Gamepress gives both sets an A ranking, but puts ES above C. The advantage of ES is the 0.5s duration difference (1.1s vs 1.6s). This allows for a higher likelihood of dodging charge attacks. As well, C generates energy slightly slower but has a higher dps. This means that it will reach solar beam slightly slower compared to ES, but puts out more damage in the mean time. As a side note: C/Solar is a better defender!

For strictly attacking blissey and Snorlax, I'd say both are about equal, giving ES a slight advantage. If you were to power up ES, you could use C as trading fodder

Edit: I just noticed the difference in levels. If stardust is a big concern (as well as candies) then I'd say the difference between the two sets is minimal and C/SB would be favorable, IF stardust is a BIG concern

May as well go for the level 28. I use a high level es/SoB Eggy for high level Blisseys and a 1700 cp one with c/SoB for prestiging. I like es more for dodging, but the fact I use a 1700 cp one speaks to its viability. I should note the 1700 cp one usually doesnt make it all the way through battle, but the damage it delivers is significant, so most pokemon can finish the Blissey off.

Confusion is stronger by a bit, but Extrasensory is a bit easier to dodge with.

You will have plenty of warning for Hyper Beam, so except for really large Blisseys with Dazzling Gleam, you might not need to worry about the slower dodging of Confusion as much anyway.