yea ur gonna rape ur karma on anything blue i think, if you dont wanna rape ur karma then dont do paragons this month lol. Lord Oaks is one of the champ spawns theres like 4 waves of different mobs progressivly getting harder then he will spawn after the last wave. You have to kill the waves fairly quickly and it takes like an hour or 2 of fast clearing to get it. This is best done with a buncha people or other tricks that are mostly unspoken.
U can add me on skype if u wish and ill assist u with what i can on ur questions, that said im fairly new to the shard and my play time is wierd (the hours surrounding noon and midnight)