On average RDW will have to spend one mana per card which will do 2 damage (including lands that is, the spells alone have a slightly higher mana cost and average damage output but it is easier to work in whole numbers and so the inclusion of the lands makes it so near to 2 damage for 1 mana you can forget the fractions)
Also, while it might seem tough to have your Magicians' Souls special summon interrupted by a Bystial card, in reality, Bystial special summons can only be activated when the opponent has a monster on the field so if you use the effect of Magicians' Souls as your starter, it won't be a problem at all
Mirrorjade the Iceblade Dragon can send a monster from the extra deck to the GY to have material for follow-up turns, but it can also banish the opponent's cards
13 Elemental HERO Core Elemental HERO Core requires a bit of effort to summon, as it needs three Elemental HERO Monsters to summon
On the flipside, shes a mana rock for legendary creatures or creatures of a type chosen as The Ringhart Crest enters play
