Even if Fastbond just puts two extra lands into play turn 1, you have a two-turn advantage over your opponent
Here are the general rules of thumb I follow when addressing this question myself: If my deck has green, the best mono green mana ramp spells are usually better than my multicolor options
I have to say, Studio X at Wizards of the Coast (WotC) has been hitting some serious home runs when it comes to Gruul commanders, to the point that I now have slightly more Gruul than Golgari Commander decks in my collection, despite being a huge Golgari fan for decades
You could certainly place a rounded rectangle filled white and stroked in black onto a scan of the image file, drop text on top of that, save a copy as a bitmap, and use that in the GFUI for an engrave
When I can only bring one deck with me, its typically Rin and Seri because its fun, personal, and not an overly powerful deck in my gauntlet
Mana Crypt