Puerto Rico Marathon   Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 Stage 7 damage (all)   5.600.000   9.300.000       damage (fire) 165.000           damage(USA, UK, ITA BB)         4.500.000     damage (potential) 2.300.000 36.000.000           damage (potential) (IJN ITA PA CA)         47.000.000     ribbon (fire) 100             ribbon (fire/cit/flood/torp hit)   1.500           ribbon (cit/torp hit)     130         ribbon (cap/def/assist) 40             ribbon (2ndary)     4.500     7.200   ribbon (plane kill)   300           ribbon (main battery hit) (IJN, FR BB)         1.700     ribbon (fire/flood) (IJN PA DD)         200     ribbon (citadel) (USSR, IJN, ITA BB)           130   ribbon (main battery hit) (USSR, PA, EU DD)           7.000   ships sunk 65 90 72         XP   400.000   950.000       XP (CV)   135.000           XP (BB)   135.000           XP (CA)   135.000           XP (DD)   135.000           XP (USSR, UK CA)           350.000   base XP   85.000 105.000   150.000 150.000   base XP (CV)     48.000         base XP (BB)     48.000         base XP (CA)     48.000         base XP (DD)     48.000         base XP (USA USSR EU DD)         50.000     base XP (Commonwealth)         30.000     base XP (IJN)       27.000       base XP (USA)       27.000     base XP (USSR)       27.000       base XP (GER)       27.000       base XP (UK)       27.000       base XP (FR)       27.000       base XP (PA)       27.000   25.000   base XP (ITA)       27.000       base XP (all other nations not mentioned before)       14.500       Free XP (CV)             350.000 Free XP (FR, IJN CA)             350.000 Free XP (FR, GER BB)             350.000 Free XP (FR, USSR DD)             350.000 Commander XP (EU)             580.000 Credits 12.000.000 20.202.020 20.202.020     20.202.020   Credits (CV) 4.000.000             Credits (BB) 4.000.000             Credits (CA) 4.000.000             Credits (DD) 4.000.000            

Assuming I read all the missions correctly, this is what you're looking at if you wish to grind the Puerto Rico "for free". You'll notice that in order to finish all or even most of the directives, you'll need a wide variety of ships of all classes and nations. You'll also notice that we can celebrate the comeback of beloved and totally not questionable missions such as "sink x number of ships" or "get X number of plane kills". Oh and if you really plan to grind the ship without spending anything, you better have a comfortable chair as for example you're planning on scoring just over 800k base xp over this period, amongst other things. That's 400 games right there if you average 2k base XP.

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And here are the extra missions in case you've got Gorizia:
    Stage 1 Stage 2 Stage 3 credits 1.800.000 2.400.000 4.000.000 damage dealt 500.000   750.000 XP   80.000   base XP 5.000     ribbon (citadel)   15   ribbon (main battery hits)   400   Commander XP     100.000 ships sunk     22


Edit: I missed a few missions for stage 6, so if you're looking forward to grinding some 50k base XP in German or French DDs or score 2700 torpedo, rocket or bomb hits, that stage has you covered as well.
    • Cool
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