Syclant's movepool is already surprisingly close to X-Act's guidelines. I tried taking it apart earlier, and found that the elemental Fangs were really the only things that made it questionable. If they're removed, X-Scissor, Ice Punch and Bug Buzz are the only viable moves in the level-up list. We could remove Night Slash if it really matters. Syclant would still get Shadow Claw. Earth Power, Superpower and Tail Glow are the only egg moves that get any use as far as I know. That only leaves a total of six viable moves in both lists, unless you consider Counter viable. We could probably even keep one of the Fangs. Maybe Thunder, since it fits better flavor-wise.
As for the TM moves, I see no need to change any of them. Unless there's an urgent need to toss useless flavor moves, and there isn't in this case, I think they should stay. Say what you want about the CAP project's purpose, but a pokemon with an incomplete movepool would upset the fanboys in all of us. I'd support removing Spikes and the Screens just because they make little sense flavor-wise, but let Air Slash, Flash Cannon and Water Pulse stay.
Basically, Syclant's movepool isn't as bad as people think. I'd scrap no more than the following moves: Fire Fang, Night Slash, Reflect, Light Screen, Spikes and possibly (probably not) Thunder Fang. Note that these suggestions only follow X-Act's guidelines, and don't consider the possibility that, say, Earth Power or Superpower might be broken. Still, I would lower Syclant's Speed before thinking about that.
X-Act's guide refers to "competitive moves worth using". Since Syclant has huge offensive stats on both sides, and can double either stat with a single Swords Dance or Tail Glow -- almost any offensive move with 60 BP or more is "viable" on Syclant. Just because these moves are outclassed by a 120 BP 91% accurate Blizzard, does not mean that the moves are not viable. It just means they are inferior to a godly Blizzard. I also think any commonly used support move that is used by other OU pokes, should be considered "viable".
In Syclants Level Up list, I count ten (10) good moves:
Thunder Fang
Fire Fang
Ice Shard
Knock Off
Icy Wind (debatable)
X-Scissor
Night Slash
Ice Punch
Bug Buzz
All of those moves are high-powered attacks or are support moves used by various OU pokemon in the metagame. X-Act's guide suggests no more than three that aren't also TM's. So, X-Scissor is fine and Icy Wind is debatable. Pick three from the remaining seven. So Syclant loses four (4) moves there.
Let's look at TM's. I'll remove all the TM's that are Bug or Ice, all the "must have" TM's that X-ACt's guide specifies, and all the worthless moves. That leaves us with:
Water Pulse
Taunt
Light Screen
Brick Break
Reflect
Aerial Ace
Steel Wing
Roost
Focus Blast
Drain Punch
Shadow Claw
Stone Edge
Swords Dance
Rock Slide
Poison Jab
Flash Cannon
That's 16 decent moves remaining. Now, X-Act's guide does not advise any limits on viable TM moves. But just for sake of comparison, Infernape -- widely known for having a TM list to die for -- has only 14 moves left after the same criteria is applied. So, if we wanted to give this an Infernape-like TM list (we don't have to, but I think we should), then we remove two (2) moves here.
Lastly, we get to Egg Moves, where Syclant is really obscene. X-Act's guide specifies no more than four (4) competition-quality moves. Syclant has seven (7) Egg Moves, and they are all high-powered, commonly-used metagame moves:
Earth Power
Superpower
Spikes
Counter
Air Slash
Crunch
Tail Glow
So we need to lose three (3) moves there.
By my count, Syclant should lose nine (9) moves, at a minimum. And that is assuming that we max out every move category. Any time you slash nine competitive moves from a movepool, that's a major change. We can leave most of the moves used on common sets. That's fine with me. But we need to get the movepool within reasonable limits. It is far from reasonable now.
EDIT: I removed Bite from my list of "viable" Level-Up moves. I didn't notice it until Hyra pointed it out below.