Uniforms will make a significantly larger impact on your progress at this point than Mags or Psylocke pack will. BP I think has a T2 ticket which might be handy at this stage, but its always on sale, where as the 50% uniform sale only happens once a year as well.
Thats 5 easy WB kills, soon to be WBU once you get some T2's going. Deeper progress into shadowlands. ABX. Pretty much everything.
Since you have Sharog, and shes T2, saving some crystals for her uni seems wise. It might sting to be so close to that ticket and leave it though.
for your current roster bunch of prem unis gives you more depth for SL ABX WBU, while Psy/mage pack gives you one character + some resource farming missions.
Basic rule for crystals IW/Ragna unis>deluxe packs>BP pack> others
46/35% on EQ means you cant regain 1500 crystals from deluxe packs
its up to you, but i would spend 10k on unis (11 prem unis (IW WS/IM/CAP/SM/WM/Thor/DS, Ragnaloki/hulk, +2 more (maybe QS if you want to work on him) +625 uni(antivenom for WBU)) to get also a mrut and after start saving for deluxe packs.
most of the above characters are easy to farm, especially WS/IM/cap/SM/WM/venom are 1-8 story characters consuming half the resources for ranking/T2, loki/thor/hulk are bio selectable/farmable and also not problem to get them to 6*/T2.
This should give you easy 15 floors of SL even at T1, 5 WBUs a day, most ABX days, which in sum gives you a lot of resources to work on your roster further
I would recommend the X-Force package. You get a 6-star Psylocke, who's great even at tier one, along with an easier Deadpool progression and a reusable source of phoenix feathers and m'kraan crystals. It's a nice mix of immediate payoff and long-term benefits.
I looked at your roster, and I think I'd recommend IW Thor. It gives Thor a guard hit on his third skill, and if you switch between that and the invincibility on his fifth, he'll be a lot less squishy. Definitely try to max out his skill cooldown, though: the closer it is to the 50% cap, the easier it will be to keep him alive.
This suggestion is outside what you asked, but you should really focus on your cards. The stat boosts from cards is relatively huge and applies to all your characters, so it's worth it to get a bunch of five or six star cards. I'm not suggesting the card loot boxes, but try to run a lot of dimension rifts. Cards are especially helpful for getting skill cooldown up, which will make a bunch of characters really hard to kill with the proper rotation, which in turn will make world boss way easier.