Laning

The entire laning phase of Iggy is incredibly easy; all you do is E -> RMB the wave to clear it and then walk back to your tower. Don't cross the river, and do not interact with your opponent. Keep two turrets on your side of the river that can hit the minions in the center, but do not worry about them too much. Our turrets are really for show right now. You should always be looking towards the jungle since you never have minions to last hit, and make plays if they are available. Generally, the laning phase ends when you have your first two items. With these, you will be pretty strong, and landing an E -> RMB on anyone can bring them to half-health.

Optional Items

Of the optional items, I usually prefer the two mobility items, Wraith Leggings and Dreambinder, the most, and I think you can play those two every game and be fine. I almost always finish builds with Oblivion Crown if the game gets to that point. For the situational optional items, Life binder can be used if the enemy team is low on burst damage. Combustion is helpful if you are playing against multiple melees. Caustica is useful against Magical Armor items. Tainted scepter is for teams that are healing a lot against you.

Late Game

This is the part of the game where it gets hard to play Iggy. You do a ridiculous amount of damage, but you lack mobility options. This means you are relatively team-reliant. As hard as it is to believe in your teammates, you need to play around them. Positioning is essential in fights, and once you have either of the movement items, your turrets become important to keep enemies from diving you. Also, do not forget that the R can be recast to knock back early. Try not to get caught up in auto-attacking in fights too much. It increases your damage, but you will be much closer than if you just play around with your abilities.