Before rules changed a time ago I had mamaged to get the Shock Trooper and had upgraded to level 4.
Since then, I have achieved one upgrade - an upgrade from lev 4 to lev 5 through 3 stars on a heroic defense.
I am about to attempt to get the lev 6 upgrade by reaching the ultra-chrome league in the current Tatooine Conflict. (Though I have only ever reached Obsidian League twice in every conflict I've been in)
(-:- Eidolon -:-)
Sith'n'Slytherin - Squad Leader
HQ: 9 / Donated: 8,897 / Reputation: 597 / Base: 2,418 / Medals: 10,912 / Atk: 1,300 / Def: 253 / Joined: 2015-02-15