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Play 3 Jurak Vello and 3 Jurak Guivre. Those two can pull out the most of your deck, and having 3 of each on offensive and defensive is amazing.

Since they're both going to be in attack position, I highly recommend Waboku over Threatening Roar. Waboku can be used on the offensive as well as the defensive, and baits out any Honest that would disrupt Jurak Guivre. You can also, when during your opponent's turn, activate Waboku after a second attack when your Jurak Vello is destroyed. Threatening Roar can only activate at the beginning of the declared Battle Phase or to the response of your opponent's first attack.

Being that they're your main engine, I wouldn't play 3 Herrera, since the destroyed monster must be in defense position. It's unlikely to happen on a regular basis. Cut it down to 1 or 2 at most.

Imagine Jurak Auro at 3, with One for One in deck. Play the card, ditch a Jurak, Special Summon Auro from the deck. Instant effect using Auro, and/or use of Solidarity(which I'm still not a fan of), and has more openings for Jurak Meteor.

It's not very ideal to go ahead and attack an opponent's monster in attack position, no. However, 1700 is plenty to destroy a monster in defense. I should know - I play Chaos-End Master, and he has 1500.

Book of Moons, and Enemy Controllers. Offers great control over your opponent's side of the field and creates openings for your monsters to break through. I'd definitely run 2 of each, if not a third Book of Moon as well.

Being that much of what I read of the Jurak theme, their Special Summoning force grabs anything Level 4 or lower or 1700ATK or lower - there's much more benefit to that being attack position.