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HQs:
Chapter Master Artificer Armor, Powerfist, Shield Eternal, Bike
Company Command Squad Camo Cloak, Astropath, Autocannon

Elites: N/A

Troops:
8x Bikes Attackbike 2x Gravrifle, Multimelta, Combi-grav
8x Bikes Attackbike 2x Gravrifle, Multimelta, Combi-grav
Platoon:
PCS 4x Flamer, Krak Grenades, Melta Bomb
Platoon Squad: Commissar. Autocannon, Krak Grenades
Platoon Squad: Autocannon, Krak Grenades

Fast:
Vendetta Gunship Heavy bolters

Heavy Support:
Thunderfire Cannon
Thunderfire Cannon
Manticore Camo

Fort:
Aegis Defense Line Quadgun

So I know bringing IG allies is a bit old school under the current meta. But I feel like they still bring so very good piece to the puzzle.

Big threats in the current meta:

Mechdar: I think between the scouting gravrifle platforms and some autocannon/ barrage support I can de-mech Eldar decently well.
Daemons: My Chapter Master can handle one maybe two, and the vendetta backup by support fire should be able to handle the rest.
Tau: I 'm confident between some savvy tactics (I've played Tau myself for the past couple years) I can beat them in a straight up shooting fight.
Space Marine: Bike armies should be interesting. Tough fight, depends on who goes first.

What other concerns should I have? Do you think the IG part is worth it? Recommendations for what I should change?

Don't think full bike squads with AB is the way forward any more. 3 smaller squads would be better.

IG platoon can work with bikes, but really you want a 30-40 man blob rather than 20. Vendetta, manticore never a bad choice.

On the basis you have 1 unit in reserve I'm not sure astropath is worth it. Grenades not really needed on the platoon. If they get into CC with a dreadnaught then plenty else has already gone wrong.

The krak grenades are for if the squad has to fight MCs. I do see your points though. I'll try to adjust my list a little.

HQs:
Chapter Master Artificer Armor, Thunderhammer, Auspex, Shield Eternal, Bike
Company Command Squad Camo Cloak, Autocannon

Elites: N/A

Troops:
5x Bikes 2x Gravrifle, Combi-grav
5x Bikes 2x Gravrifle, Combi-grav
5x Bikes 2x Gravrifle, Combi-grav
5x Bikes 2x Gravrifle, Combi-grav

(Platoon)
PCS 4x Flamer
Platoon Squad: Commissar. Autocannon
Platoon Squad: Autocannon

Fast:
Vendetta Gunship Heavy bolters

Heavy Support:
Thunderfire Cannon
Thunderfire Cannon
Manticore Camo

Fort:
Aegis Defense Line Quadgun

The nice thing about having the attack bikes is that I can split the unit off into combat squads or leave them together in KP mission. With this setup, I'm screwed.