A stratios alone can’t clear a relic/data site in C5/C6. we are talking about several thousands of dps.
but, there are 2 exceptions : in C5 only, one relic and one data have a realy low dps first wave (around 400dps + neut + scramb). you can tank it with a passiv shield ship. I heard strat can do that. personaly, I did it some time ago with a shield myrmidon.
warp in, drop a mobile depot, kill every npc BUT NOT THE LAST ONE. if you trigger the next wave your are dead.
refit with analyser, hack, loot
refit stab (because the last npc point you)
scoop your mobile depot and warp out
but, sadly, the loot is basiquely worthless except when you find a “talocan” can. there you can find more than 100M isk, but it not apear very often.
so, imo, it’s not realy worth it, except for the chalenge or as a personal achielvement. you better do regulars relic site in C1-3