Stop making excuses for the game being so easy.
Please link me any video or people talking about doing an instance with 1/2 the people that it was designed for with just can we say 1 tier more gear. Remember not a boss but the entire instance. Also dont bring up Lootship either.
At least 3 tiers.
Assuming the OP was in Rakata, they'd be 3 grade above what a Normal EV is tuned for.