If you don't risk your well being joining the saas company (imagine being fired after two years ..?), ask for at least 30 % equity, if they ask for a vesting sc

If you don't risk your well being joining the saas company (imagine being fired after two years ..?), ask for at least 30 % equity, if they ask for a vesting schedule ,ask to keep the same salary 250 K untill equity vested.