Please read the ENTIRE LOT before commenting.
You wanted to avoid the giga inflation, right? I was thinking you could increase the prices of the non-II Active / Passive skills. They are used pretty much always (with the occasional II-Skill noob) during PvP, which has grown increasingly popular since stakes were added. Take a look yourself, Rush alone only costs 2,200 gigas. All of the other skills are extremely cheap too, and their prices haven't changed for a long time.
Something else I noticed. How come Ion-Wave costs more than Rush? Ion-Wave is a less popular skill, so their prices need to be changed. All in all, I think the prices of every non-II skill in the shop needs to be tweaked and increased no only to avoid the giga inflation, but to make sense so that the most popular packs cost the most (the same rule already applies to transes).
I get the feeling that maybe I'm wrong about the most popular skills being the most expensive etc, and maybe it's meant to be that the most powerful and best skills cost the most instead. Either way, Ion-Wave should still cost less than Rush, and for the sake of another way to avoid giga inflation, all of the non-II skills should cost more.
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The unfortunate thing is, if the price of the skills DO rise, newbies of Boutcheetah would be unable to purchase them and therefore have a harder time leveling up. While even paying 220,000 gigas for 100 games of Rush may see cheap to a high-level or rich person, it would be impossible for a low-level person to obtain it and it would take them much longer to get the money (as they can't play maps like 172 where the most expensive (when sold to the shop) parts drop).
Because of this, maybe it's a good idea to allow players to buy II skills for gigas by paying a high-but-reasonable price. If you don't like this idea either, then there is still the option to allow players to pay for II skills by using both gigas and coins. By this I mean that in the shop, you would be able to buy a II skill (100 games) for 20,000 coins, and see the same skill next to it but being sold for gigas instead (I don't know how much yet).