How are you planning on fielding that many heavy support choices?
You may want to seriously consider fielding two of the dragoon units and one of the ballistari in an ironstrider cavalier formation, being able to outflank them all on the same board edge can get them into thye fight much faster and more reliably as well as catch your opponent off guard.

The special rule is also great for targeting the enemy warlord with the balistari. If you were to do this i'd suggest changing the balistari to 2 units of 3.

It may also be worth combining two ranger squads so your warlord is in a group of 10 with 3 arc rifles and giving the alpha an arc pistol (and maybe refractor field).
With a potential 7 haywire shots with preferred enemy and a boosted BS you could potentially scout forward and glance a landraider to death first turn. It also makes your warlord more survivable as they have to go through more wounds first.

Overall it's an interesting list though, i'd try something similar myself if i could afford 18 ironstriders!.
It could do surprisingly well because most people won't have faced anything like it before (and most CC attacks won't hurt a dragoon).

I am running 2 Skitarii Maniples which is allowing me to take that many Heavy Support choices. Honestly I have never tried the formation and I am somewhat hesitant in doing so. The ability to outflank potentially can get them into the fight a lot faster however they would still have to wait until turn two before charging or even worse I could fail the reserve role and have a decent chunk of my Army off the table. I've actually had a lot of success just putting them at the edge of my Deployment Zone and running them forward because of how fast they are, however I definitely will have the means to try out the Formation, have you used it personally?

Are you referring to them having the Identity Confirmed Special Rule? It's definitely not a bad idea I am running them in the squads of 2 however due to the large number of Mechanized Infantry lists at my store (Gladius, Ork Trukks, IG Chimeras ect.) I have found splitting them into three squads really expands my flexibility in dealing with multiple targets.

I have actually found giving the Alpha an Arc Pistol to be complete Overkill in almost every time I've used them. I totally agree with running 2 squads of 10 or at least one Squad of 10 with the Alpha but since I need four squads to run 2 Maniples figured it was the best way how to get to that point as cheaply as possible. I am also considering running Vanguard instead of Rangers however I think the Rangers fit the "Outrider/Scout/Cavalry" theme more.

When I sold my Tau to pay for a surgery I did not expect my insurance to do as well as it did and I had a decent chunk of change left over. That combined with trading some of my Tau I already have nine out of the 18 I need and should have the other 9 within the year. And in the games I have played playtesting this list it has often been the case, this list is surprisingly durable and hits like a ton of bricks. Granted I haven't played against Tau or any true gunline armies yet, I feel that they will kick this Army's ass but will have to check it out to be sure.