"Stats and builds are related to each player, it depends mostly of personal preference and such..."
But it was wrong from my part asking most players to achieve something w/o even giving an example of what they should be aiming to... hence the reason behind this thread.
The screenshot I gonna present to you guys, is from one of my warlocks I use for test... and the MATK you will see is the one I had until last week (every week I try to improve my MATK output and I did managed to increase it for quite a bit) and I would like for you guys to use it as a "short term goal" so you guys know what to aim to...

As before, I'm not going to give you the STATS or equipment need it to get such MATK, but if people are interested, I can suggest some gears in the near future in this very own thread.
Just for people who are wandering how much MATK is that... well, just apply the formula...
MaxMATK = 544*0.4 + 544 + 402 = 1163.6 matk.
As you see, that's your MaxMATK and remember that is based on stats, gear and food... it does not include Miscellaneous and/or musician's buffs as well as %MATK (raw and towards race) including Mystical Amplification.
If you use Amp all the time for casting, you would have: MaxMATK * 1.5 = 1163.6 * 1.5 = 1745.4matk
After that, it will depend on your %matk and you can get up to +5,430matk... and after that, you multiply by the spell itself.
Any doubts... don't hesitate on post here... and hope people find this somehow useful.