Huzzah!
The simple start:
1. Make a shaper. Put all your skill points into Magic Shaping, at least until you get to 10. After that put points into Intelligence.
2. Dash for the Testing Hall and obtain Create Artila. Make a bunch of Artila. They will be overpowered for the first island. You don't need to put points into Int, they will work fine without it.
3. But, don't do the entire first island, just dash for the required zones and move on to the second island.
4. There, dash for Create Vlish -- I forget where it is, but FAQs should help you out there. Absorb the artilas and make a bunch of Vlish. Again, no points into Int, you can add those later if you desire. I also recommend getting the Create Vlish canister on the island ASAP, and once you have enough essence, replace 2 or 3 Vlish with Terror Vlish. Terror Vlish don't terrorize in G3 but their missile attack is poison-based instead of magic-based, which is extremely useful against certain enemies, like Gazers.
Depending on how the numbers work out and how early you get Create Vlish, increasing Intelligence before you have 10 in Magic Shaping may be helpful if it allows you to create more than one vlish a level earlier than you would otherwise. (Remember, your creations get 3/4 of your XP with no scaling, ever, whatsoever, in G3.)