Perhaps what you want is more along the lines of:
ScoreScript.currentScore = 0;
if (enemyTriangle.tag == "normalEnemyTag") {
ScoreScript.currentScore = ScoreScript.normalEnemy;
} else if (enemyTriangle.tag == "eliteEnemyTag") {
ScoreScript.currentScore = ScoreScript.eliteEnemy;
} else if (enemyTriangle.tag == "bossEnemyTag") {
ScoreScript.currentScore = ScoreScript.bossEnemy;
}
ScoreScript.totalScore += ScoreScript.currentScore;