Easier Methods for Evoking Options

hello all, i was wondering if i can ise a magickal system that worked in summoning other spirits, and use it to summon for e.g the spirits in Konstantinos book, or the ones from Practice of magickal evocation . thanx
p.s almost every where i go, the name Vassago keeps turning up, and how some people didnt even go thru full ritual to call Vassago, what are simpler ways to call such beings .?

Thanx

The "systems" are there for mainly two reasons. One is they build up momentum and allow us the energy to call forth these spirits. Two they allow protection for once the spirit arrives. Granted once you get along in your path you can do it almost effortlessly but it takes time. The systems are there for a reason mainly because they work. Use them first before you try and adapt your own.