RIGHT FRONT TIRE WEAR???

[HummerRidin26"kmc's]

alright basically i have ruined two diffrent toyo proxies with in ohh 9 month period i have had 4 alignments within that period my truck has 26" wheels is why i have had four alignments to prevent tire wear yea well my truck seems to continue to just ruin my front right side tire the wear is on the outter edge of the tire basically i was wondering is there some type of suspension problem that can cause this to continue to happen almost like the truck cant hold an alignment even though it drives striaght an everything yes i have had steering issues aswell Tie rods an the rest of the usual stuff pitman arm idler arm ect that stuff has been replaced and fixed yet still wearin the right front tire out any help thanks for ya time