Is this team good enough to solo Scyther?

i don't get where you are going with this. some of the pokes you named are better with one move of a type over another of same but both work so TM is low priority. golems are currently best rock type and there are far better ground types so it's foolish to insist it's not worth giving it a TM.

see which poke the game auto-selects vs common defenders such as snorlax or blissey as well, vape or golem.

AT on Vape is a good move.
Making your Golem into dbl rock moves is a solid option...no matter the charge move.

I would sooner CTM an EQ Golem before an AT Vape....anyday

Scyther is a really weak raidboss due to being double weak to rock. If you want to solo Scyther, the fastest way to do this is by aquiring rock attackers. They need the fewest powerups and dont need to have that good IV's. 4 level 30 double rock golems would already beat Scyther (any moveset) with no dodging and ~30sec+ to spare.

Try seeing it this way, one TM or 124 Geodude candy+ a high level Geodude for a chance at having a double rock Golem.

Golem is currently the best pure Rock attacker. While Ttar blows golem out of the water, Ttar lacks a quick rock attack. And when it comes to taking down Moltres, Zapdos, Entei, or Ho-Oh, Golem is probably the top dog.

My Scyther squad begins and ends with 4 Golems between levels 31 and 35. The fourth one never faints, even if Scyther is weather buffed with both attacks. Scyther's double weakness to rock makes this raid trivial for me to solo. The only thing I can think of that's easier is taking on a Magneton with Zap cannon with a strong Rhydon - I can do that without fainting at all, with a few dodges.

Further, my attitude about CTMs is that they are for mon with two good charged moves and one bad one, like Ttar's set of Stone Edge, Crunch, and Fire Blast. You get Fire Blast, you CTM it and take what you get. I don't have enough CTMs to play the roulette game and keep flopping back and forth. If you CTM a ground move on golem, you either get rock or rock, both work. One and done.

Of course, it's up to you, but Rock is the way to go after Scyther, unless you want to make it harder than it has to be.

Why are you talking about Vaporeon as a great pokemon when we have Gyarados? For that matter, Vaporeon's neutral DPS is not and has never been particularly great because its attack stat isn't that good.

As far as CTM effectiveness goes, WP Vaporeon and EQ Golem are pretty similar in that 1 CTM is guaranteed to give a large DPS boost. AT Vaporeon is almost as good as HP for attacking.