“Hoard” is the one word advice that works across all tiers of play.
Initially, you hoard because you don’t have roster space.
When you open a token, the chances are insanely high the it will be a character you don’t have rostered yet. So, you have to sell the character because you don’t have enough HC (Hero Coins) to be able to afford the new roster space. So you hoard tokens until you have enough HC to afford a new slot. This guarantees that if you pull an unrostered new character, you can roster them. When this happens, you buy the new roster spot, stop opening, and start hoarding again. Having to sell a 6th cover of a rostered 2 Star character does sting, but they are so common now that you’ll get plenty of chances.
In the 3 to 4 Star transition, this mindset remains, however you also start to see the problems the end game has. Being forced to sell a 6th or 14th cover of a 3 Star character hurts a bit more now, especially if it’s a top tier one (like Dr. Strange, Iron Fist, Thanos, etc.) Still, the driving factor is roster space, so hoarding HC is still the goal. And depending on how of a “gotta catch 'em all” mindset you have, you’ll be here a while.
Once you’re at a point where roster slots are not so much of an issue, that’s where hoarding kicks into high gear. Being forced to sell a 6th or 14th cover of a 4 Star character is awful.So, to mitigate this as much as possible, you have to hoard ISO so that if this happens, you can instantly champ that character so you can use the cover. The one thing you can’t avoid, even with hoarding, is the 6th cover for a non-covered maxed character. Well, I suppose you could, but that involve MASSIVE hoarding, so that you can try and brute force the RNG to give you a different cover for that character so you can champ them and then use that 6th cover you pulled before.
This is the situation I am in.
I have all but 4 vaulted characters cover maxed.
I have 7 of the active 4 Stars champed, and the others are 1 or 2 covers away.
The problem is that I keep pulling 6th covers.
And, even if I were to get a 14th cover, which would force me to champ that character to avoid wasting the cover, I don’t have enough ISO to level them.
So I hoard… Everything = ISO, HC, Tokens, etc.
The only time I go on a Legendary Token spending binge is right when a 5 Star is about to get vaulted. So, in a week or so, before 5-Lord kicks out Thanos, I will spending whatever LT’s and CP I have trying to get as many 5 Star Thanos covers I have, and hopefully I’ll have enough ISO by them to champ any 4 Stars I pull excess covers for.