C is current crit percentage, a_r is the regular overheal rate, a_c is the critical overheal rate, m is a binary variable indicating the presence of the meta, and k is a regularization constant to account for haste, spellpower and basically anything else other than crit percentage.http://elitistjerks.com/cgi-bin/mathtex.cgi?\frac{k(0.99-c)(1-a_r) + k(0.01+c)(1.5(1-a_c)+0.45)}{k(1-c)(1-a_r) + k??(1