It is important to approach this deck with the appropriate mindset in order to get the best mileage out of Elsha. While the deck can explode very quickly, attempts to storm off while opponents have potential threats/counters ready or before sufficient protection and mana is available to you will result in setbacks which can really slow the deck down. Before casting
Elsha of the Infinite, be sure to have at least 1 counter in hand or an alternative strategy to recover as having her countered or destroyed on the turn she is cast can put the deck on its heels. Control the board where necessary while leaving some available counters to protect the storm win, establish a mana base and protection via cards like
Pithing Needle if necessary, and strike when the moment is right. Sometimes this means a race to drawing the deck as quickly as possible, and sometimes it means being more strategic - everything depends on the matchup.