Spoiler:
Firstly, discussions in the balance forums do not consider t2 or t3 as per this point here; "Our strategy for making changes in T4 is as follows." it is not part of any discussion, period. Further posting regarding t2/3 will result in infractions for posting off topic on un-related issues.
Secondly, introducing invader as the entry level t4 gear set implies you believe balance changes should not be made at this point of gear implementation, contradicting your previous participation in balance forum discussions and posting of proposals. Additionally, you make no attempt to disprove why state stabilization is a not issue. I will explain the issue once more, afterwards, if you still don't understand the issue raised in the OP, send a balance mod a PM with questions. Posts about changing the base t4 gear set only reduce the scale of difference between the base balance gear set (invader you suggested) and Sovereign do not solve the issue.
The issue raised: if balance changes are to be made at the current level of implemented gear, Annihilator and Mercenary (therefore the respective stats, armor, mitigation and so on values), and not overwritten by forth coming gear sets up to the point of Sovereign, the outcome of the interaction, simply put as damage dealt (considering all aspects of the combat formula) between 1 group in Annihilator gear against another group in Annihilator gear, must be as close to, or equal to the damage dealt when 2 groups of Sovereign geared players fight against each other. Hence the state of stabilization.
This discussion thread is to allow the community to reach a consensus regarding what method they want to see implemented to achieve this level of state stabilization. By;
a) posting which option they agree with and why OR
b) explaining why they believe these options are not appropriate to reach a state of stabilization and proposing an alternative solution.
If a consensus is not achieved on how to approach this state then due to the differences between forth coming gear and our currently implemented sets, none, or extremely limited balance changes will occur and the balance forums will cease to exist until end game gear sets have been implemented and acquired by the majority of players.
-Gerv