Unfortunately no grenadier skill, although hipshooting would be a useful skill to pick up for them.
What's the archeoteks builds?
Here are the 5 main variations of Archeotek I've noodled with:
#1 "The Unarmed Tek Monk"
Lasgun
Mesh
Torsonic Alpha (free)
Fixer
150 credits
Intent: uses the rifle at the start of the campaign to help suppress with its good BS. A laspistol won't benefit due to unarmed status. Then, use it to counter charge champions.
Pros: D3 unarmed damage might severely injure a champion early campaign. This is Min/Max to make the Archdotek the most affordable. (Possibly fielding two)
Cons: only two CC attacks due to unarmed descriptor, +1 on the charge, allowed.
#2. "Affordable Unarmed/Digi Tek"
Laspistol
Mesh
Torsonic alpha upgrade
1 Digi
Fixer
170 credits
Intent: min-max for low strength combat. Getting one pistol and one CC digi will grant +1 attack. Making for 4 attacks Strength 3 and +1 on the charge. Also note that if an arbitrator lets you use your two unarmed attacks, you might benefit from the D3 damage if you sacrifice the +1 from the pistol being holstered. Which would make it be 2 unarmed attacks @d3, 1 attack S3 digi.
Pros: a more affordable low strength build that may focus on being good enough for enemy gangers. Not needing strength upgrades ASAP. Buys one Digi to get the second close combat bonus as well as an extra attack (2 attacks for 25 credits, yes, please)
Cons: needs more strength for CC specialists like Goliath at T4, etc.
#3 "Min Goliath Killer Tek"
Laspistol
Mesh
Torsonic Gamma upgrade
(15 credits)
Power knife
Fixer
185 credits +50 credits (2 Digis) variant.
Intent: Most minimum high strength "melee-versatile" attacks at an affordable rate.
Pros: 3 attacks, +1 on the charge, at Strength 6. Affordability beats out Spider Rig? Could add two more digis for 2 more attacks over Spider Rig, making 5 attacks @ S6, AP -2.
Cons: Spider Rig would be a superior big picture.
#4. "Strength Spider Rig"
Laspistol
Mesh
Spider Rig
Torsonic Gamma
(15 credits)
Fixer
240 credits +(25 credits for power knife)
Intent: Min purchases to get the power of the spider rig.
Pros: the spider rig makes WS +1, S +1, making the attacks be 6 attacks on the charge @ Strength 6 from "paired" descriptor. Consider an early stat buff to the attack profile if possible as it will double the attack profile from 4 to 6 with paired.
Cons: need to get the charge from a 4" move unit
Note: Could go from a high strength build, but the 15 credit upgrades are so cheap. Could also add the Power Knife instead of pistol for half of your CC attacks to get AP -2.
Note: Could add a cyberarachnid for 75 credits for a "Fearsome" trait to help prevent charges, but mightbget costly early on.
#5. "Tekno God"
Laspistol
Mesh
Spider Rig
Torsonic Gamma
(15 credits)
10 Digis
Fixer
465 credits +25 credits for power knife variant
-80 credits for no spider rig min variant
Intent: Max attacks, Max Strength.
Pros: 16 attacks on the charge! @ Strength 6! (14 attacks, S5 if no rig on charge) so many potential wounds will kill gangers outright.
Cons: expensive unit best for late campaign. Spider Rig may not be needed at max digis probability.
Note: Consider choosing more cyber technika or field armor if even more disposable income is earned, making the unit even larger.