At CL380, every 600 credits is 12 levels and enough to unlock a card through the track. I included the Mobius example, but Juggernaut, Iron Man and Captain America bundles are all more attractive than some of these more expensive bundles, albeit ridiculous, because of the cost to cards ratio:

* Ignition & Innovation $99.99 4 cards (+4 potentially) +5000 Gold ($12.50-$24.99/card)
   * Mister Fantastic First Steps Creees Variant
   * Human Torch First Steps Creees Variant
   * 5000 Gold
   * Series 5 Collector's Pack (contains 1 card and up to two more)
   * Series 4 Collector's (contains 1 card and up to two more)
* Clocked In $14.99 2 cards +1200 Gold ($7.50/card)
   * Mobius M. Mobius PANDART STUDIO Variant (series 3 so you will unlock eventually is my understanding)
   * 1000 Credits (1 card)
   * 1200 Gold
* Solid Foundation $49.99 2 cards (+2 potentially) +2500 Gold ($12.50-$25/card)
   * The Thing First Steps Creees Variant 
   * 3000 Collector's Tokens (between a series 5 and 4 pack which contains 1 card and up to two more)
   * 2500 Gold
* 2600 Gold $34.99 ??? cards
* April 16th Bundle 2500 Gold ($34.99) 7 cards ($5.00/card)
   * X-23 Zeronis Variant
   * 3500 Credits
* March 12th Lockheed $99.99 26 cards +4000 Gold ($3.85/card)
   * Lockheed Anime Variant
   * 15000 Credits (25 cards)
   * 4000 Gold
* Pro Bundle $99.99 20 cards ($5.00/card)
   * 12500 Credits (20 cards)

What the hell is wrong with this game's monetization? Also based on my research, best upcoming deals are

* Web Shop Celebration $2.99 2 cards ($1.50/card)
   * Iron Man Kael Ngu Variant
   * 1500 Credits (2 cards)
* Price to Pay $9.99 2 cards +Captain America ($3.33-5/card)
   * Captain America Alex Ross Variant
   * 1600 Credits (2 cards)
* February 26th Man-Spider $49.99 6 cards +4000 Gold ($8.33/card)
   * Man-Spider Ryan Benjamin Variant
   * 3000 Credits (5 cards)
   * 4000 Gold
* March 3rd Psylocke $19.99 6 cards ($3.33/card)
   * Psylocke Zeronis Variant (series 3 card)
   * 3000 Credits (5 cards)
* March 10th Peni Parker $49.99 11 cards +2000 Gold ($4.55/card)
   * Peni Parker Yo Shimizu Variant
   * 2000 Gold
   * 6000 Credits (10 cards) 
* March 18th Wasp $9.99 3 cards ($3.33/card)
   * Wasp InHyuk Lee Variant (series 3)
   * 1500 Credits (2 cards)
* 2200 Credits $19.99 3 cards ($6.66/card)
* March 30th Chamber $74.99 18 cards (+2 potentially) ($3.75-$4.17/card)
   * Wasp InHyuk Lee Variant (series 3)
   * 2000 Collector's Tokens (series 4 pack which contains 1 card and up to two more)
   * 10000 Credits (16 cards)
* March 31st Weapon X Aurora $99.99 12 cards (+7 potentially) +5000 Gold ($5.26-$8.33/card)
   * Weapon X InHyuk Lee Variant
   * Aurora InHyuk Lee Variant
   * 5000 Credits (8 cards)
   * 5000 Gold
   * 6000 Collector's Tokens (between 1 series 5 and 1 series 4 pack or 3 series 4 packs which contains 1 card and up to two more)
* April 1st Sage 4000 Gold = $54.98 6 cards +1800 Tokens ($9.16/card)
   * Sage PANDART STUDIO Variant
   * 1800 Collector's Tokens
   * 3000 Credits (5 cards)
* April 7th Foo $99.99 15 cards +8000 Gold ($6.67/card)
   * Shou-Lao the Undying Alberto Del Lago Variant
   * Fin Fang Foom Mike Azevedo Variant
   * 8000 Credits (13 cards)
   * 8000 Gold

As a new player, I'd spend more money on this game if it felt like I was paying $10 per card