inspiration is not so much for winning lane, nor is it the best tree for scaling. you take it for gold efficiency and the mid-game powerspikes

magical footwear is insane on gp for a few reasons.

1. you are saving 300 gold which allows for a quicker trinity force
2. a quicker trinity force means you can start racking up gold with kegs
3. magical boots have +10 movespeed over the ordinary boots meaning you dont necessarily need to upgrade them, which saves you an additional 800 gold
4. gp isnt particularly reliant on tier-2 boots.. tabi boots are nice put putting 800 gold towards your 2-item power spike is even better

more ways to add to your gold efficiency are starting mana-crystal, buying cull, selling your biscuits

of course this assumes you take magic boots, going biscuits+timewarp is a totally different playstyle since you will always go corrupting NOT mana crystal, and thus you will be taking far more heavy trades and using the instant healing