T57 Heavy Ammo too less. 16 only.  In CW all using gold.  So amour in cw is nth.  FV215b relord time 7 sec around .    Best of all heavy if say 1 on 1 situation

It's XVM in AIOMOD.

E means efficiency, which is your performance as a factor of your stats, it's a result of your winrate, kills, hit %, damage done, survivability, etc.
9 means you're in the upper tiers of efficiency, which is very very good. The xxxx number is the quantum of your efficiency, and purple means it's very very good.

At thelower end, red/orange/yellow means shite/bad/average, and the corresponding numbers will be low. with E >2000 or something like that, the colour changes to something like cyan I think, and you're considered a unicum.

My SP get 6.75 sec loading time. Then I puy back my 100% SP loader crew back...it also 6.75 loading time!!

Depent you like platoon or solo pub.

To Join world class clan you need tier 9 above and winrate 57% above.

Casual fun clan , you need atlease tier6 ...can join them tank company.
To Join 555+ clan ....you need tier3 enough and learn how to 5555+++

Those extra plate are call spaced amour.  It make the bullet penetration reduce alot after first plate, so the bullet no more penetration on ur tank amour.  Some spaced amour change the bullet off course.  My pz4 that space amour turret plate save me few times from KV1S & IS 122mm shot.  Zero damage.