The initial idea for this post came from an old (july 2011) article on Dropship Horizon about building armies from incomplete lines...
- Call the helmet on one of those guys some sort of "C² interface" and that guy an officer;
- Consider the pistol sized weapons to be very high tech and very compact assault weapons whose capabilities rivals other species more cumbersome rifles or SMG;
- And consider the SMG sized weapons to be equally high tech and compact support weapons.
One issue remains though: the lack or variety. I would consider buying 2 or 3 of those packs to make a squad/section sized force, but anything bigger would be to much... So I took a leaf of the Warhammer 40K book and turned them into an high tech Alien Empire with lots of battlesuits and client species auxiliaries...
- CMG Ygs obviously operating in small high tech fireteams with compact high power weapons
- Khurasan Meso-Nai makes wonderful savage auxiliaries armed with a mix of bows and spears, or even mounted on giant birds and lead by either a shaman or a tribe leader in high tech armour (a "gift" of his Ygs masters)
- Another good condidate for a client species of the Yds is the wasplike Khurusan Vespulids...
- Just like Chris, I thing GZG High Tech Grav Vehicles are the perfect match for the Ygs... APC, Tank and MLRS would make a good starting combined arms force, with other option available like C² or PD...
- The spearhead of any not-Tau force is of course battlesuits: my choice for those would be CMG Protolene Khanates Battlesuits: they're available with a wide variety of arms (both CC and ranged weapons) and with various "backpacks" (comms, missile launcher, guns, mortar and if I'm not mistaken some sort of jump pack)
- The latest addition to this concept: Micropanzer Gitungi have just the right mix of GW stealth armour "facial features" and Yg stockiness... I just hope they're the right size to be considered Yg stealth PA without too much of a stretch!
- Another staple of any not-Tau force, GZG has a pack of 9 Grav Mini Drones
- Albeit physically pretty different from the Ygs, CMG Praesidentia Ancients could relatively plausibly (to me at least) be Ygs from a different biological cast and make good religious leaders/high value targets/VIP objectives...