I'm still in the mindset that gear swapping does NOT have an effect but rather dmg from the avatars is calculated by the gear you have on when you confirm a BP rage move just like a WS. Additionally, using the right avatar against the right mobs is also a factor. But I still believe it's all luck when the attack lands because you never know what's gonna happen. However, I have to agree with Evanos that the mob being solid lvl is for better testing. So for that reason, after getting inconsistent results from Clippers (I made videos but I'm impatient on youtube and mediafire uploading) I go to Gustaberg and attack bees and pissed off a few noobs....
I'm not bashing Taisa, not saying he's a bad SMN but his screen shots don't show his chat log responding to the windower input command with "Equipment changed.". Even when you input a macro via windower it will always show those words in response in the FFXI chat log which would lead me to believe he might have (not saying he did) just equipped the gear then used the BP. But I'm assuming he has that filtered. Also, the Vanadiel time was inconsistent between testing screenshots so....yea....
Regardless of that technicality, I did my own testing with time stamps.
I have screen shots and many other summoners that will agree with me. It does work.
Sorry to say that just because they agree with you doesn't mean you're right.
I'm not here to make claims that I'm the best SMN in the history of this game, far from that. I'm here to make a point and to prove a case about, as you so eloquently put it:
my job.
Here are my merit statistics (not much sorry ><

:
Gear that I didnt swap out in my testing: Evoker's ring, Water staff, Staff strap, insominia earring, antivenom earring, blue cape +1, hierarch belt, Hedgehog bomb, SMN relic hands, and YYR
Like Evanos, I did a test completely naked.
Test 1: My regular gear.
SMN relic hands, legs, feet.
Test #2:
I changed gear without macro to having 2 accuracy pieces (relic hands and AF legs) and evasion (af feet)
Test #3
I changed gear from Test #2 to 2 accuracy pieces and 1 attack piece in my macro:
/pet "Spinning Dive" <t>
/wait 2
/equip legs "Evoker's spats"
The result:
Test #4
I attacked again with the same gear I changed to in Test #3:
Test #5 : Naked, no gear
From this testing on a mob that's lvl 1, the gear swapping during the readying phase of an avatar attack will NOT circumvent the damage nor accuracy. The gear that is on the SMN at the time the ability is confirmed is considered in the calculation. However if you macro in gear before you confirm the attack,
just like a WS you can circumvent the damage output and accuracy. I conclude that results vary from mob to mob and the avatar you use on the target mob and your equipped gear.
On a side note: