Saturn, Mars, Pluto....8th House....
Both Mars and Pluto are "8th House" planets....
That would catch my attention, stellium or no.
Three planets in a sign or house have extra power, stellium or no.
Mars and Pluto share some qualities...Saturn and Mars are enemies.
Analyze each planet separately, according to its conditioning. Work out individual meanings. Also don't forget to look carefully at Venus, who rules the house. She influences the whole thing in a deep way. Is Venus 12th House in your chart? or 11th?
The 11th is the "Good Daemon", while the 12th is distress.
Work out the details of Venus first, as she is "controlling". The 3 planets in her sign/house are subject to Venus. All 4 are in Air; what does that say/do? Saturn and Venus are in Mutual reception.
Mars is in Detriment. Saturn is Exalted. Sun is in Saturn's sign; his ruler is "happy" by sign at least. That helps Sun perform in a more positive way.
We need to convert "Saturn in Libra in the 8th House" (with all its conditions included) into some sort of statement in Human Terms. The horoscope is the Plan, blueprint, of a human being. Turn the chart into a description of one...You. We tend to think in terms of astrology and forget that the whole purpose of astrology is to understand the Human that the chart depicts.