i didn't use any ebb or pbb from my bb1-2 grind... just stick with the normal ship if you have patience then you'll have easier grind on ciao or conte if you get it then switch to gulio (1914) for more supports then back to ciao/conte remodel for your bb4 then either gulio or leonardo for more support slot until you get your bb5...
for your support more engies plsss... RM don't have that good OH with 3 engies you'll just run out of OH fast....
my rm crew so far is 2 EBVE rel, 3 reps(all +12)/ 7engies(3 +12 and 4 elites) 1 scout ^_^