Main idea deck to summon Firewall Dragon Darkfluid for 4 counters
1. For good search we need Cynet Codec on field, if it not starting hand search this card with Micro Coder.
2. Make Splash Mage > Transcode Talker - and Cynet Codec give Code Generator (or Gatchiri Ignister if Generator already in hand/GY).
3. Use Transcode effect for reborn Splash and make Excode Talker (Splash + Generator).
4. Generator send some good monster to GY is can be: Sea Archiver, or Dotscaper, or EM:P Meowmine.
5. Excode Talker > Cynet Codec search wind moster, is Link Infra-flier or Parallel eXceed.
6. Time to summon Cyberse Witch in extra monster zone (right) and then summon Infra-flier or eXceed to zone Witch points to for his trigger effect.
7. Witch find Cyberse Sage and Cynet Ritual. Ritual summon Sage, use her effect for fusion Cyberse Desavewurn.
8. Make Cyberse Integrator with Sage + level 2 monster.
9. Desavewurn can summon monster from hand (level 3 or 4) and make XYZ with Desavewurn + that monster
10. Darkfluid.
I'm autist, and can make some error in this text. This deck is based on cards i already have, you can make better with Firewall lvl 4 monsters. In situation with brick, try make Firewall Dragon or Accesscode Talker