Honestly, if you havent yet, you can check out our Secluded Springs battle guide to earn a ton more hourglasses, tickets, and EXP, if you missed any from that month
For spellslinger decks, escalate spells pair nicely with spell-copying effects
Mist is the geists sorrow
Channel Ice - At the beginning of your end phase, put a flow counter on Channel the Bleak Expanse then destroy it unless you put an Ice card from your pitch zone on the bottom of your deck for each flow counter on it
The character on the Draft Booster box has similarities in the sword, shield, and helmet
Basically, the TLDR is that you can build an almost infinite number of really fun, solid, and competitive Commander decks for free with the help of the card-rental programs