Well I did the call and the results, if there were any, were invisible to me. I wasn't much surprised, considering that evocation/invocation is probably the most advanced magical technique that exists and I am still new too magick even if I sometimes like to think that 'i know everything'. The whole process was a failure. xD
First thing I fucked up was that i overslept and I woke up at the 6:49 and the first hour of Mercury was ending at 7:07. So I created the lamen in a hurry and finished purifying and consecrating it at the second planetary hour, which was the Moon hour. I also purified all the other items I'll be using in a ritual later. After that I used my spare time to memorize remaining prayers/invocations.
At the beginning of the ceremony, I took a bath and I felt pissed off because I couldn't get my family to be quiet, so I was also distracted by telephone calls etc. I guess that is not the good state to be in when preparing for the ritual. x)
Altar Set-Up: A big candle, my wand, eight magic candles, water-bowl with the Lamen under it.
The structure of ritual was following:
1. Hammer Ritual - to cleanse the area and my negativity. It worked marvelously well, I felt at peace after it and more focused.
2. Drawed the subtle circle around the physical one - my visualization could have been better.
3. Lit 8 candles
4. Did the Ritual of Heptagram, Invoking Mercury - I had an excellent concentration and visualization, however it lacked that special feeling I usually have when I do it properly.
- After it I accidentally hit the candles with my hands and I spent another couple of minutes putting them the way they were standing. I could almost hear the Gods laugh at that moment. When I cleared that up, I recited the following:
- Prayer to the God
- Preliminary Conjuration
small pause
- Conjuration
Now, the Conjurations didn't do their job, or to be more precise - I haven't done mine. I memorized them, but I didn't practice reciting them enough so I had a lot of trouble to concentrate. I didn't have the flow of consciousness and they didn't get me into a trance at all. I had them written on paper, but reading them while trying to scry? I won't do that again, ever. xD
After that epic fail I tried reciting all prayers again and since that wasn't working eithery I did some freestyle calling, chanting Ophiels name in a combination with the Conjuration given in Arbatel. The idea was to inflame myself with prayer. I did that for 10 minutes or so and that put me into a light trance but I wasn't getting anything useful. I did the conjurations for the last time and since Ophiel wasn't showing up, I decided to state my SOI in case he's here but I can't sense him. After that, I gave the licence to depart and the ritual was done. I did the Hammer ritual afterwards, just to clear that ritual 'aura' from my room.
- This was my first "big" ritual so I learned a lot. One thing that sticks out is how much planning and preparation is needed and how easy it is to fuck things up. I also figured that Imperial Arts was right, this is a religious Magic. Before the ritual I had the idea that praying to God is just one way to get in contact with these spirits, now I think that that is the core of the system and working with the Olympic is just a way to get closer to God. They are not separate from the Christian/Hermetic teaching. While reciting the prayers, I felt like a liar at a lot of points and on intuitive level I felt that I have the wrong approach. This is a Magic for someone who 'digs' the whole JHVH, You Shall Have No Gods Except Me, and You Are All SInful Bastards appproach.

I also asked the Runes about the whole operation and this is what I got:
- My relationship with Arbatel before this ritual: Laguz. I interpreted this as "You got lost, dude.

" since Laguz is a Rune of subconscious, subtle, water, love, dillema, dreams etc.
- Results of this ritual: Gebo. Gebo is the Rune of gifts, friendship, bonds, promises etc. I figured that this indicates that I did made the contact, although for some reason I didn't percieve Ophiel or he heard but was was busy.
- Results of me working with the Arbatel in the future - Uruz. I get that this probably means 'empowerment' or maybe even an initiation.
I decided to do nothing more but wait - if Ophiel gives me some sign like show up in my dream, I'll try invoking Him again and work with Arbatel some more, but if nothing happens I'll place all of my attention to Runes and Norse Gods and Wights.
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Well, since this is your first evocation - I guess this line of reasoning is to be expected
I really hope that I will be forgiven for making a lot of stupid claims on this thread and that in a few years you will all forget what my statements from the time when I was young, naive and stupid. ;D Thanks everyone here, you've been most helpful. This is the best community I've seen on the internet, this forum is gold.