Obviously TacNets are great for support. Similarly, a high Perception and Sensor suite (drone based) will let you use the Active Targeting rules by linking your sensors to a weapon and lay down extremely accurate supporting fire.
Many GMs will let you use the same rules for actively targeting with handheld sensors as well, letting you effectively play as a spotter for the group's street sams by linking your sensors to the street sams weapons and actively targeting.
Don't forget to consider a Buffy the Buffmaster mage build. Heal and health spells can provide very easy and cheap boosts to your allies, as can many illusions (especially if you have a mind for trickery).
Theoretically a INT based mage (for Perception) could easily hack (you never actually use the Log for your hacking roles), autonomous rig, actively target, run the teams TacNet, provide magical overwatch and buffs, and summon more allies all in one sitting. Think about it, 4-5 drones out, 3-4 bound spirits out, a TacNet of Awesome, a few sustaining foci for some buffing spells, and a couple simple actions for actively targeting a couple poor poor bastards. That's probably a little overboard though.
And of course you wouldn't technically have to cyber up to do any of that, but a point worth of ware would make life a lot simpler.