Griffin Witcher Ranger:
Can be at max a 10 for 5. Next round you can carry over that boost to arch griffin (as mentioned in the video)
Still not thinking that this will be a competitive strategy. If you are lucky and you have those two Griffin Ranger and Arch griffin in round 1 and your opponent builds a build row. Then you play your three cards and have at max 29 points (4 body Griffin Ranger, 21 on arch griffin(5+8+8)). Then your opponent uses tall removal or reset power and you only have 4 points in case of removal and 9 points in case of resetting power.
Speaking in provision: In best cases you used 20 provisions for at max 25 points. in worst cases these are 20 provisions for 4 points. And you must be lucky that your opponent uses a row stack strategy. The more other boosters you use on Arch griffin, the bigger the potential damage is.
Then in round 2/3 you still have the problem to play him again. You can use Pincer Maneuver,
Oneiromancy,
Royal Decree or
Alzur's Double-Cross. What does this mean in terms of provisions/value?
Total value will be 25 (round 1) + 21 (Arch griffin round 2) =46. For the provisions you have to add at least the ones from Alzur´s Double Cross. So you spend 28 provisions for 46 points (more if you invest more boosts in Arch griffin).
The main drawbacks of this strategy is:
1) You really need the right cards at the right time
2) You are encouraged to invest all boosts in arch griffin. This is very risky.
Synergies: Arch griffin; Maybe you can use Vernon Roche and Sabrina Glevissig to enhance rows a bit; defender. As mentioned by betraymechino Kerack Gity Guard to move units to a row (but then no more boosts for Kerack City Guard)
Antisynergies: Destroying and big damage