Jump out from behind them, and shoot them in the head, now every body's dancing, the dance of the de

4 in fitness means more face-to-face capabilities and thus less time spent looking for right hand advantage. It also means that you don't need a cyclonic to play agressively, even in platinum, so that you can put something more useful as armor bonus : a power amp to one-hit destroy a platinum Phantom's barrier (and to save some ammo if you're using the Harrier), an adrenaline module that makes your character doing everything faster (notably running from spawn to spawn) or a stabilization module (when using the Typhoon or the Revenant for example). The ranks 5 and 6 of Stim Packs aren't great, especially the "8%" damage bonus that is actually a 2,7% bonus when fully equiped. I see only 2 cases where they could be useful : you're not using a gear giving a grenade capacity bonus, or you're running a melee build. If you're not in those cases, skip them, they're too costly for what they bring.

Fitness 4 is only +300 to shields, I don't see that being useful.
A cyclonic III is +750 (double the base shields), IV is +1125.

But why would you ever not use an AR on him?

4 in fitness means more face-to-face capabilities and thus less time spent looking for right hand advantage. It also means that you don't need a cyclonic to play agressively, even in platinum, so that you can put something more useful as armor bonus : a power amp to one-hit destroy a platinum Phantom's barrier (and to save some ammo if you're using the Harrier), an adrenaline module that makes your character doing everything faster (notably running from spawn to spawn) or a stabilization module (when using the Typhoon or the Revenant for example). The ranks 5 and 6 of Stim Packs aren't great, especially the "8%" damage bonus that is actually a 2,7% bonus when fully equiped. I see only 2 cases where they could be useful : you're not using a gear giving a grenade capacity bonus, or you're running a melee build. If you're not in those cases, skip them, they're too costly for what they bring.

Boogieman gonna boogie. At least we didn't get the page stretching lolololol.

At the contrary, it makes a big difference. I know the math about cyclonics, but still find other armor bonuses + 4 fitness more useful on the TGI than cyclonics + no fitness.  A power amp 4 for example add 880 damage to Overload on organics' shields and barriers ; not bad for a power that you can cast every 3s. 

Actually, I really enjoy equipping the geth shotgun on the GI ( same color scheme as the geth hunter ) and cloaking then shooting teammates in between waves. It's hilarious cuz 99% of the time they jump then shoot me back. It's 1000x's funnier when its versus geth and I do it during waves.