I find this fight very interesting. From the discussion so far, SMP is a brawler and not a tactical MA type just a really great brick. Magic also seems to have little effect on him or atleast thats what the writers want the readers to think (when we are looking at BA and Mordru).
RKT - is above a skyfather level. Do people understand this (not trying to be condescending) that means he should be able to go toe toe with guys like Spectre and Galactus and Beyonder (hmm actually not sure about this guy but you know what i'm getting at) Yes this is my opinion but imagine odin and all his friends combined and that aint enough to make RKT even blink.
RKT powers (not sure it's 100% magic) like energy blast may or may not hurt SMP too much. Assuming that its 100% magic and that SMP can resist something on RKT's Level (still doubt it but let me amuse you). You think a Guy who eats gods for breakfast and with that much knowledge and power won't be able to A. Create a K-nite that SMP from his dimension/timeline what have you can effect him? B. fill the battlefield with red sun radiation and breath of smp for the finishing blow? You think RKT just can't walk up to SMP and pop his head off (like he did to Loki).
I'm not saying RKT even needs to exploit SMP's weaknesses he can go fisty cuffs with SMP. RKT was casually stopping Mangog hits. Yes I know SMP would beat Mangog ass but not with nearly as much ease.
RKT powers are not like Modru or strange. Seems like RKT can amp his own actual physical attributes to so far "unmatched" levels. This thor wouldn't waste time playing with him or take any unnecessary actions. RKT 10/10; this is spite.