Celtic Heroes

Ok, i dont have that much xp lixes. I mostly have 0 xp lixes. But i really like to level up. I try to gain 1-3 levels per-week. I need help knowing where to grind. I like to level in groups but i can go without a group. So if anyone knows where to level at please tell me!!:) I am a level 138 ranger, mostly frozen met armour including bow, no frozen leggings. And i am a Dex ranger THANK YOU in advance

level at the 140 green boggans until 143 then level at 145-149 boggans and at 146 either stay at 145-149 boggans or goto the 150 bolgs and etc