Never tried to make a map like this last one, so I can't really offer advice. But I think that one needs to bear in mind that we're looking for patterns and avoid making "stills" when it comes to mapping climate.

As for your previous maps, (with ITCZ and everything else). I think you should place those large low pressure centers (green) in the "warm" hemisphere only - that's south in january and north in july. And also, your landmasses don't seem big enough to have such a pronounced curve on the ITCZ. This is my opinion based on comparison to Earth's patterns - I'm no climatologist.

As for your currents, I'm no oceanographer either, but I found these gems:
PlanetInAction.com - "Perpetual Ocean demo"
NASA | The Ocean: A Driving Force for Weather and Climate - YouTube