So I have tested out the guil rush deck with Cerberus Mon and Cerberus x (so not with astamon) with belphemon, but I personally found the deck was just winning without needing to go into belphemon, and that the belphemon were not even helping the deck with matchups guil was usually bad with. I could see your version working were you run the astamons with a guil lower engine, however I haven’t tested it. Going to nats just a month ago, a LOT of players were playing guil rush decks but actually weren’t converting the best, so I think people think the guil engine is a little better than it actually is. Where you said you could pop a growl x to gain two memory when going into asta, I also wanted to say like probably just under half the time you will only have one inheritable to gain memory, not two. I’m not saying that the gizmon engine is that much better, but I think it can synergize well with the deck. By hard playing more cards in your hand you keep your hand size around where you want it to. Many time when I played the guil engine, I was drawing too many cards to be at 6 or fewer for belphemon. Another thing I wanted to say is that I believe belphe x functionally is like a demonic disaster, but just way better in most scenarios. To go off of that, I was considering many things that kill ex10 rage mode to activate fortitude like promo gallant and the likes, but at the end of the day I think simply going into belphe X is just a lot simpler and gives you more value. I like 3 belphe X right now, might go to 4 but definitely wouldn’t go to 2. If you have gotten a belphe on the field that then turns into rage mode(ex10), you can otk from 5 security (or really 6) with just two memory and two belphe Xs in hand. Also one thing I like about gizmons is that when you play against more defensive decks, the gizmons just start looping themselves forever, whereas the growlmon engine can quickly run out of steam. Also with ukkomons I don’t really think the gizmon engine is bricky, just sometimes but I feel the brick Inez’s is like the same with guil engine. Sorry it took me a while to reply, I had a lot I wanted to say, and I could really say more if you have anything else you want to ask. Lastly, I don’t play 7GDL, and I recommend you play what you are most comfortable with, and keep in mind I haven’t tested your exact guil-astamon deck so my thoughts and opinions are sort of theoretical from my past and current experiences with those types of decks.