Dont do it, I had the exact same thing with Sabretooth and G4mora, then randomly pulled the last cover out of a heroic token of all things (and a lucky bh for sabre), and now they jumped queue, and are my highest 4*s. I totally understand the frustration, but it will be so sweet to get all those champ levels!
The “save a cover” HfH seems to still exist from the last report I heard. You do need to hold a cover on the vine (I think) and might need to wait a few days or so.
Just start a second Mystique, you’ll get there in about a month and a half. I did the same thing to finish a drax a little while ago since he was my last fed 4* without a champable cover spread
Yeah I’m in an odd position for valkyrie to 5* thor. I will get thor done sooner if I start a new valkyrie instead of pouring champ levels onto my 287 valk. But just cannot mentally bring myself to start a new valkyrie.
Valk is golden. A little off-topic here but one of my long-term ideas is to build a x/5/5 Valk and leave her at level 70. Only takes giving 1362 damage to gen 4 of your strongest AP and getting 633 damage to create 2 Yellow strikes. She’d be squishy as all get out but quite the battery-with either 4* Rocket or the right supports on the right characters the AP gain would be insane.