Eh, intelligence is fluid and the whole concept of a single IQ score is broken. Someone with a high IQ can be real-world dumb and someone bad at school math can become a genious engineer. And both can be equally good or bad at politics. It's all just skills. What matters is mental flexibility (how well you halves are connected) and a healthy image of self and others.

As long as you try to keep a flexible viewpoint and to experience new things now and then, you're doing more for your skull muscle than most.

Edit: ok, training your visual-conceptual imaginative power seems to be beneficial overall.