1) you cant kolo with just 2 char. by default, 1 player need to have 3 char to kolo. unless you control 2 char of yours + 1 your friend.
2) i cant suggest you what char you should play. but lets talk about the meta of the game itself. currently there are 3 class that really ace in solo kolo. people at french forum agreed that OSA, SAC, ENI works well in solo kolo.
3) if i were you, i would buy Dhossil parts (2 item) + those Power thropies + crimson dofus 80% power and rock with iop at kolo. You still do good damage with this %power build. proceeed if you have tons of sp scroll. of if lack on kamas, just go with classic 12ap /5@6 mp moowolf and play at 150+ level. Escaping wrath is easy but hey, it give your teammates chances to plan tactics on 4th turn.
4) lemme tell you my story. i've start inter kolo from 1st day of interkolo arrive at rosal. i start with my 50 char. i equip that ectope hammer and pawning all sort of bots n player with +air dam throphies. my piwi hit quite hard. that cheated way help me to gain like 30+ sp scrolls in mere 2 months of on and off gaming. now im just using osa@eni for kolo 150+. if you go with osa route, just focus on %resisst and maximize your vit on gear. while having decent intel stats. that ruskie hat got +5 summon which is brutal. that for weapon, use purple bow for cheating 400-500 hit x 2 = 6ap + whip spell rofl player will pass their turn and give up fight when they see your osa heal 1000+ per turn + 3-4 drago and summons rofl i always cry when my opponent giveup the match...
5) it may sound really evil... but you have to take advantage of this class.. farm sp scroll and later on u can trade back the sp scroll at kolo tower (the NPC).
6) tips: my osa when it reach 160+, i delete it and power level it again to level 150+. just for enjoying pvp kolo at that level without need to vs higher level. thats how i live with those stupid end game update. if you know solo gaming wont bring you far in game due to elistist content, just take advantage of other aspect of the game.
7) i wrote really long here. rate my essay plz :)