You have Strider, Ranger of the North but need support.
Look for Wose Pathfinder or Generous Ent.
Threats as well as mana. Fixing lets you splash a powerful card, but too many off-color spells slow down the creatures that make this plan work.
You already have Strider, Ranger of the North.
Consider Generous Ent if it fills a useful job.
Ent can find a Forest early or become a large creature late. With Strider in play, make your land drop before combat to give a creature the bonus and possibly first strike.
The support is missing
Take castable creatures and answers. If the engine never arrives, use the good cards rather than forcing narrow support.