Some gems give 1.4% Evasion/Dodge, so if you slot them into all in your crafted armor your dodge will increase madly making it impossible for you to take damage
You can make 13 crafted items each with 3 gem slots. that is 39 slots in total.
You can put 1.4% in each gem slot. 39x1.4=54.6% dodge
double tab back (S) that is another 50% dodge
Total dodge is 104.6%
If you want you can also use magic immunity gems. These are stackabled gems too. This increases your stats too and it makes you hard to hit.