My personal value analysis for day 1:
200% xp boosts: 75 boosts for 300 sigils. Not as good as the xp branch we had last season in week 13, about twice the cost. Still 300 sigils is about 1500 rubies worth, so still better value than buying them directly in the forge for 6000 rubies. But anyone who picked up the branch last season will have a lifetime supply of these already.
Legendary Sorcerer HP rune: Not a very exciting rune, will drop from silver chests fairly easily, and very few people have tons of sorcerers to rune up. It’s not very expensive if for some reason you do need one.
Energy Packs: A little hard to value. Normally takes 46 gold chests to get these, but of course the majority of the value in those golds is in their timers and sigils. I think it would be reasonable to consider packs to be about 10% of a gold chests value (with another 10% inners, 20% sigils, 60% timers). With that arbitrary key, these packs are worth 1840 rubies in gold chests, making 2500 rubies worth of sigils a fairly high cost. I would skip these.
Inner Fires: Gold chests actually have significantly more inner fires than energy packs (by about 50%), but this branch values them the same. By that metric, this offer is significanly worse value than the energy packs which were already borderline. I’d pass on these even if you’re short on inners, better invest in gold chests.
Crafting Shards: 100k shards for 500 sigils is rubbish for anyone active in Atlas, considering you can easily get a million shards a week there. For people without atlas shards are very hard to come by, and this is pretty good value compared to bronze chests and rider lines, so it is an option if these are the elements you need.