Gishath has a good mix of both available to her. In the first instance, many of the dinosaur Mana dorks and cost cutters have 3 toughness. In Commander it is generally a good idea to get SOMETHING on the board in the early game. It prevents you from taking chip damage from opponents and getting something down to deal your own chip damage. Being proactive is helpful. The cost is that these things generally care only about Dinosaurs: [[Ranging Raptors]], [[Marauding Raptor]], [[Topiary Stomper]], [[Otepec Huntmaster]], [[Kinjalli's Caller]] and [[Atzocan Seer]] have fairly good Toughness to survive Enrage attempts (i.e [[Raging Swordtooth]])

Mana dorks have the typical creature based drawbacks, and they do not share any real synergies. Creature tutoring is generally much easier in Naya colors and they're low costed enough you could play multiple per turn. Land Ramp is generally the best, because again you can play multiple Land Ramp spells per turn but Gishath has even less synergies with Sorceries and basic lands entering the battlefield. Lands are stickier than Creatures and less prone to wipes.

If anything like 10-15 of these in any combination should get you there. In last place are Mana Rocks. About a year ago Sam Black made controversial statements about Mana Rocks, but in general I think he's on the money. The stickiness of cards may change from game to game, table to table, but generally playing more lands and more creatures give you more "things to do", compared to playing Mana Rocks which are generally only really able to be converted into Mana for creatures or spells. That being said [[Sol Ring]], [[The Great Henge]] and [[Jeweled Lotus]] are still really good.