I came across this FTK combo through a Youtube video and have been doing lots of testing with it. This deck is what I've come ended up with that has the best consistency and has been allowing me to build a board if needed.
You will brick, DW bricks. It happens, this isn't a competitive deck but it can build boards if you want too (you either FTK or build a board, usually)
Here, I focus more on the Lvl8 to try extend the combo to use Coach King Giantrainer as I found with his build I couldn't quite get there. I'd always run out of momentum after using Number 15.
Fabled raven is handy, but it doesn't come up enough. It can't be searched through Snoww, so I took it out. I also don't run 3 Zalamanders as they can only be used once, so I find 2 is enough. 2 Lucent is also enough as you only need 2 for Number 6. Genta I play 2 of, instead of 3 as it's only got a single use. Blackwing - Zephyros can bounce an active copy of Gates back to your hand allowing it to be used again, plus brings a Lvl 4 onto the field. Because of this you could technically cut the 3rd copy of gates. But it doesn't hurt to open 1 or 2 copies as you usually will have enough resources in your starting hand for them.
One pin point is adding Ceruli to the hand from the GY. If you could accomplish this, it would add a little more consistency with Lucent to bring out Number 6. But I haven't found anything (or know of anything, please do let me know if you know something that would work, I would love to test it)
The combo & materials required to complete it, step by step
note: This is a general step by step, generally you should start with Number 60, but sometimes it doesn't work out that way, think ahead and try reach the correct materials. You have to ensure Number 60 is in the gy BEFORE Number 6 is summoned, or you'll miss the timing on the burn effect as it's an on summon effect. Most of the time, you should get the opponent down to 1400 LP. The final 1400 is the trickiest as you usually run out of momentum. But with enough luck and planning, you should be able to get there. GL!
(2 x Lvl 4 monsters)
1. Number 60: Dugares the Timeless,
- Effect to Draw 2, Discard 1
If you need an additional Lv8 Summon, try go for Saryuja. It can SS one from hand
(2 x Lvl 6)
(this is what Lucent is used for, try to send Lucent using Ceruli Effect, it can summon the second copy required for this piece)
2. Number 6: Chronomaly Atlandis
- Effect to Equip Dugares from gy, Eff to detach and remove Dugares then burn for half their life
(3 x Lvl 8 (Return these too the field using DW monsters, Danger's can be used also. Saryuja can SS one if needed))
3. Coach King Giantrainer
- Effect to draw, then burn (if monster) x3 (800, 1600, 2400)
(2 x Monsters)
4. Geonator Transverser
- Effect to swap Giantrainer (or Number 6, if you don't have Giantrainer) with their Ceruli
(2 x Lvl 8)
5. Number 15: Gimmick Puppet Giant Grinder,
- Effect to destroy Giantrainer and burn for 1400
Victory!!
Credit to HaniTCG (Youtube) for the FTK Combo