the ideal solution I would recommend would be making melee a one skill combat like mage and ranged by either removing attack from melee calculation and branding it as a jack of all trades accuracy/aim or strength as previously mentioned making strength an all styles skill swing blade harder/pull back bowstring further/faster or concentrate/summon inner focus for mage damage boost. so the formula would then read to max; 99 def + 99 str/att (see above) + 99 style skill ( range, mage or att/str) + 99 hp + 99 prayer + 99 summ. That way you don't favour melee by penalising magers/rangers for having one less contributing skill but still include all the combat related skills in some sort of relevant way. Not sure how to split the skills formula wise maybe 25:25:25:10:5:5 as a very rough guess on my part or what the max level would be. Also to colour code the combat level blue for mage, green for range, red for melee, depending on there highest skill out of the three primary combat style skills (range, mage and att or str (based on above decision)) or if they have maxed all three make there combat appear as yellow or purple. Alternatively show the colour combat based on the style of weapon they wield in real time, so it alternates as they switch weapons as dagganoth mother does during weakness phases in horror from the deep between red, blue or green.