What I found to be useful, was to get my archer to r20, do the class quest, then get 8k guild marks and buy the trait "Out of Sight". This reduces enimity by 10.

On a sidenote, Other traits a CNJ would benefit from:
THM Firm Conviction - increases defence while casting.
PUG Prime Conditioning - Increases heals received by 10 %
LNC Fleet of Foot - Increases movement speed by 20 % while in active mode (Awesome when you need to move to land that one cure in a hurry)

They all require you to do the rank 20 class quest to be able to buy for 8.000 guild marks.