My shard is the same age as yours. Until literally a couple of weeks ago, I was the only on running a full dark side team in the top 50.
If you wanna nuke wiggs/chaze ... what I did was
Early on before I got Zaul I was using Vader/Shoretrooper/TFP/Maul/RG
Then it was DN/Vader/TFP/Shore/Maul (got me to #1)
Then it was DN/EP/Dooku/Shore/TFP
Then it was DN/SA/Dooku/EP/Shore
Then it was DN/SA/Dooku/EP/ST
Now it's Zaul/Zihilus/EP/SA/ST
Note I am using fast mods - all gear XI maxed, but the above makes me untouchable vs traditional Wiggs/Lando/Boba/StH teams and Wiggs/Chaze combos as well. I suggest you try that tactic
Rex leads are also effective