Behemoth Discussion. I think I've discovered my newest favorite hero. Give me tips for becoming a protier behemoth. Few things I want answered:

Mana ring or not? I see a lot of controversy over this.

How do I block creeps in the Hellbourne bot side with Fissure? (I tried it but the creeps went through the trees on the right side and came out, 2 of them actually got stuck there, I dunno wtf was going on.)

Items to consider after building PK, because in pub games I get upwards of 20 assists and sometimes kills when I use my ult, and I get mana ring + striders + PK stupidly fast but don't know where to put my extra gold besides wards and the obvious stuff.

Max fissure or Heavyweight first? I go with heavyweight because fissure increases in mana cost and behemoth can't afford expensive spells earlygame.

Any other general tips would be cool.