Sorry for coming in late to this discussion and I agree with others here that a little trial and error might be needed.
I use Easel but not a Carvey - I have an Italian made MakerDreams tabletop CNC machine.
I carve a lot using 3mm oak sheets to make shields and other items and when I started i broke bits all the time. I found out that I need to really slow down the feed rate and the depth per pass needed to be shallow.
The software controlling my machine allows me to set the speed of the motor and again through trial and error I have found that the faster the better.
Now I have a very good idea of what settings I need depending on the type of project I am making.
Easel now has a Hole Drilling setting which only goes up and down, maybe you could get a flat-bottomed router bit - Forstner style bit - that is slightly smaller than your finished size and then use Easel to make a path that is not a fill but on the Inside of path to that will finish off your holes to the finished size and depth. That should really speed up your project, ok you need to change bits and on one project I made I had 4 different paths and 3 different bit changes to create the finished item. All done in 1 hour but at the beginning with on path and 1 bit Easel told me 3 hours 30mins. Not practical.
Hope you get things right and make your finished Egg stands.