Strengthen Efficiently!

I haven't seen this posted anywhere else, so I'd like to share the most gold efficient way to strengthen your cards in War of the Fallen.  

It costs 160 gold and 8 cards to strengthen at level 1.  This is the most gold per xp strengthen amount.  Using more higher star value cards are worth more xp.  Below is a method to strengthen 3 star or higher cards to level 160 using the least amount of cards and gold.  

Step 1: Acquire a 2-star card to strengthen and 8 1-star cards to strengthen that card with.

Step 2: Use 8 of the strengthened 2-star cards to level up your specific card with.  

Step 3: Repeat until max level is achieved.