Lockdown Tier questions for Dev/GM

I am under the impression that Lockdown will be divided up into 3 tiers to even out combat.
Will weapons and armor for those tiers behave like: T1:Stratum 1, T2:Stratum 3, & T3:Stratum 5? or T1:Stratum 2, T2:Stratum 4, & T3:Stratum 6?
If say I normally play in *4 gear, but I'm not hacking it in Tier 3 Lockdown, would I be able to put on my proto loadout and go play Tier 1 Lockdown?
Is player placement in T1-3 of Lockdown decided by the highest star piece of gear they have equiped? or does take an average of the star level of all of your epuiped items?
Example: 3* helm + 3* armor + 5* sword + 1* handgun + 3* shield = Tier 3 because of 5* sword or Tier 2 because (3+3+5+1+3) / 5 = 3?
I understand if you just don't have an answer yet because you are still in the testing phase, but if you guys had this part already nailed out we could go ahead and start planing our loadouts.
Thanks!

Yeah, going by the highest star item equiped would make the most since.
Really would like to know what strata the Tiers function like though. For example if Tier 3 Lockdown functions like stratum 6 then people equiped with 5* gear would have a larger advantage over 4* gear players, but if Tier 3 functions like stratum 5 then that will cut down on the advantage of 5* gear over 4* gear because 5* gear would receive a slight nerf.
I belive it was stated that the highest star piece of equipment determins your Lockdown Tier. So there's no running into a T1 match with Focus Modules.