start at blue and rush ur lvl 3 at this lvl u should be able to kill red golem make sure u have a smite ready and start ganks at after golem

rush ur lantern and after that get brutilzer and phage if not going to well get some tabi or mercenary boots depends on team..............
PS: remember never stop farming from jungle

once u start to get in team fights u should be tanky enought with frozen mallet, black cleaver, tabi, and some warmong to initiate a team fight.

atmas is a good idea once finish with warmong to get armor and some damage
if ur not doing good with end build u sell the lantern and add a item to ur need