Help with sentinal/ frank level up

A Hello. Ive been using the same team since vanilla. Skrull, sent, and garbage akuma. Since ive finally come to realize akuma just does nothing 4 me since i use sent for level 3 xfactor and akuma dies literally in 1 combo from most, i got this brainstorm idea to change my team after 3 years of the same. Id put frank in akumas place. Ive pretty much got the skrull level up mix down pat, but if i lose skrull im screwed cause im still having trouble with frank’s approach on the lower levels. Does anyone no a ggod way to level up frank with sentinal in a fast way or an effective way without TAC? Again im just learning frank and ANY info would be helpful. Thanks ahead of time.