Riptide Laboratory allows you to take over a game with a single Snapcaster Mage when you hit topdeck mode. 1 Snapcaster gave me 3 flashbacks in the game that I won vs. Shardless BUG. I think that if you choose to avoid Wasteland in favor of color consistency, which is probably the right decision IMO, having that extra utility from your lands is more of a boon than a drawback.
Speaking of Shardless BUG, I was thinking about effective cards to combat that specific matchup. Blood Moon is definitely a game-ender and Grim Lavamancer definitely helps smooth things out. Also, I believe there is a lot of value to be had from a card like
Redirect. It can redirect Hymn, AV, FoW, Decay, and Thoughtseize as early as turn 2. Unlike misdirection, it won't put you on parity with your opponent for cards as it will usually be a 2 (decay, TS, FoW), 3 (Hymn), or 4 (AV) for 1 effect and you can realistically flash it back for additional value.